1 of 2 CS140 Joes Automotive performs the following routine

1 of 2 CS140 Joe\'s Automotive performs the following routine maintenance services: Oil change-$26.00 Lube job-$18.00 Radiator flush-$30.00 . Transmission flush-$80.00 Inspection-$15.00 Muffler replacement-$100.00 Tire rotation-$20.00 Joe also performs other nonroutine services and charges for parts and labor ($20 per hour). Create an application that displays the total for a customer\'s visit to Joe\'s. The form should resemble the one shown in Figure below: and Lube Rushes Mac Parts and Labor Inspection ($15 00) Pats Replace Mier ($10000) labors Tre Rotation ($2000) Summary Service and Labor Parts Tax (on parts) Total Fees Calculate Clear Et

Solution

Form1.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace JoesAutomotive
{
    public partial class frmAutomotive : Form
    {
        public frmAutomotive()
        {
            InitializeComponent();
        }

        private void btnExit_Click(object sender, EventArgs e)
        {
            this.Close();
        }
       
        private void btnClear_Click(object sender, EventArgs e)
        {
            //call methods to clear all inputs on form
            ClearOilLube(); // Clear OilLube group
            ClearFlushes(); // Clear Flushes group
            ClearMisc(); // Clear Misc group
            ClearOther(); // Clear Other Fees group
            ClearFees(); //Clear Summary group
        }

       public void ClearCheckBoxAndTextBoxControls(Control parent)
        {
           //Loops there all the controls within a groupbox revewing each control
            foreach (Control control in parent.Controls)
            {
                //Checkbox controls are reset
                if (control is CheckBox)
                {
                    ((CheckBox)control).Checked = false;
                }
                //Textbox controls are cleared of any text
                else if (control is TextBox)
                {
                    ((TextBox)control).Text = \"\";
                }
             }
        }

        private void ClearOilLube()
        {
            ClearCheckBoxAndTextBoxControls(grpbxOil_Lube);
        }
private void ClearFlushes()
        {
            ClearCheckBoxAndTextBoxControls(grpbxFlushes);
        }

        private void ClearMisc()
        {
            ClearCheckBoxAndTextBoxControls(grpbxMisc);
        }

        private void ClearOther()
        {
            ClearCheckBoxAndTextBoxControls(grpbxParts_Labor);
        }

        private void ClearFees()
        {
            lblParts.Text = \"\";
            lblService_Labor.Text = \"\";
            lblTax.Text = \"\";
            lblTotalFees.Text = \"\";
        }

        private void btnCalculateTotal_Click(object sender, EventArgs e)
        {
            //Check to make sure the textboxes are valid
            if (CheckTextBoxes())
            {
              
                double otherCharges = OtherCharges(); // Calls method to calculate Other Group Charges
                double oilLubeCharges = OilLubeCharges(); // Calls method to calculate Oil and Lube Group Charges
                double flushCharges = FlushCharges(); // Calls method to caclulate Flush Group Charges
                double miscCharges = MiscCharges(); // Calls method to calculate Misc Group Charges
                double taxCharges = TaxCharges(); // Call method to calculate Tax
                double laborCharges = LaborCharges(); // Call Method for Labor Charges

                //Assign Total Service and Labor Charges to Lable
                lblService_Labor.Text = TotalCharges(oilLubeCharges, flushCharges, miscCharges, laborCharges);

                //Assign Total Fees to Lable
                lblTotalFees.Text = TotalCharges(oilLubeCharges, flushCharges, miscCharges, otherCharges, taxCharges);
             }
            // Invalid input in textboxes following message will show
            else
            {
                MessageBox.Show(\"Check values in Labor and Parts field.\");
            }
                      
        }

        private bool CheckTextBoxes()
        {
            double labor, parts;
            bool boolLabor = true; //retun variable
            bool boolParts = true; //return variable
            //Checks to make sure something is entered by user in either textbox
            if (!string.IsNullOrWhiteSpace(txtbxParts.Text)) // !string.IsNullOrWhiteSpace(txtbxLabor.Text))
                boolParts = (double.TryParse(txtbxParts.Text, out parts)); //Checks to make sure input is valid
         
            if (!string.IsNullOrWhiteSpace(txtbxLabor.Text)) // !string.IsNullOrWhiteSpace(txtbxLabor.Text))
                boolLabor = (double.TryParse(txtbxLabor.Text, out labor)); //Checks to make sure input is valid
          
            return (boolParts && boolLabor);
        }

        private string TotalCharges(double oilLubeCharges, double flushCharges, double miscCharges, double laborCharges)
        {
            double dbltotal = oilLubeCharges + flushCharges + miscCharges + laborCharges;
            string strTotal = dbltotal.ToString(\"c\");
            return strTotal;
        }

        private string TotalCharges(double oilLubeCharges, double flushCharges, double miscCharges, double otherCharges, double taxCharges)
        {
            double dbltotal = oilLubeCharges + flushCharges + miscCharges + otherCharges + taxCharges;
            string strTotal = dbltotal.ToString(\"c\");
            return strTotal;
        }

        private double TaxCharges()
        {
            const double TAXRATE = .06;
            double partCosts = 0 ;
            if(!string.IsNullOrWhiteSpace(txtbxParts.Text))
            partCosts = double.Parse(txtbxParts.Text);

            partCosts *= TAXRATE;
            lblTax.Text = partCosts.ToString(\"c\");
            return partCosts;
        }

        private double OtherCharges()
        {
            double laborCosts = LaborCharges(); // Calls method to Calculate Labor Charges
            double partCosts = PartCharges(); // Calls method to Calculate Part Charges
            double charges;
            return charges = laborCosts + partCosts;
        }

        private double PartCharges()
        {
            double partCosts = 0;
            if (!string.IsNullOrWhiteSpace(txtbxParts.Text))
            partCosts = double.Parse(txtbxParts.Text);

            lblParts.Text = partCosts.ToString(\"c\");
            return partCosts;
        }

        private double LaborCharges()
        {
            double laborCosts = 0;
            if (!string.IsNullOrWhiteSpace(txtbxLabor.Text))
            laborCosts = double.Parse(txtbxLabor.Text);

            return laborCosts;
        }

        private double MiscCharges()
        {
            double charges = 0;
            double inspectionPrice = 15.00;
            double replaceMufflerPrice = 100.00;
            double tireRotationPrice = 20.00;

            if (chkbxInspection.Checked == true)
            {
                charges += inspectionPrice;
            }
            if (chkbxReplaceMuffler.Checked == true)
            {
                charges += replaceMufflerPrice;
            }
            if (chkbxTireRotation.Checked == true)
            {
                charges += tireRotationPrice;
            }

            return charges;
        }

        private double FlushCharges()
        {
            double charges = 0;
            double radiatorFlush = 30.00;
            double transmissionFlush = 80.00;
          
            if (chkbxRadiatorFlush.Checked == true)
            {
                charges += radiatorFlush;
            }
            if (chkbxTransmissionFlush.Checked == true)
            {
                charges += transmissionFlush;
            }

            return charges;
        }

        private double OilLubeCharges()
        {
            double charges = 0;
            double oilChange = 26.00;
            double lubeJob = 18.00;

            if (chkbxOilChange.Checked == true)
            {
                charges += oilChange;
            }
            if (chkbxLubeJob.Checked == true)
            {
                charges += lubeJob;
            }

            return charges;
        }  
    }
}

Form1.Designer.cs

namespace JoesAutomotive
{
    partial class frmAutomotive
    {
        private System.ComponentModel.IContainer components = null;

        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        private void InitializeComponent()
        {
            this.grpbxOil_Lube = new System.Windows.Forms.GroupBox();
            this.chkbxLubeJob = new System.Windows.Forms.CheckBox();
            this.chkbxOilChange = new System.Windows.Forms.CheckBox();
            this.grpbxFlushes = new System.Windows.Forms.GroupBox();
            this.chkbxTransmissionFlush = new System.Windows.Forms.CheckBox();
            this.chkbxRadiatorFlush = new System.Windows.Forms.CheckBox();
            this.grpbxMisc = new System.Windows.Forms.GroupBox();
            this.chkbxTireRotation = new System.Windows.Forms.CheckBox();
            this.chkbxReplaceMuffler = new System.Windows.Forms.CheckBox();
            this.chkbxInspection = new System.Windows.Forms.CheckBox();
            this.grpbxParts_Labor = new System.Windows.Forms.GroupBox();
            this.label2 = new System.Windows.Forms.Label();
            this.label1 = new System.Windows.Forms.Label();
            this.txtbxLabor = new System.Windows.Forms.TextBox();
            this.txtbxParts = new System.Windows.Forms.TextBox();
            this.grpboxSummary = new System.Windows.Forms.GroupBox();
            this.lblTotalFees = new System.Windows.Forms.Label();
            this.label10 = new System.Windows.Forms.Label();
            this.lblTax = new System.Windows.Forms.Label();
            this.label8 = new System.Windows.Forms.Label();
            this.lblParts = new System.Windows.Forms.Label();
            this.label6 = new System.Windows.Forms.Label();
            this.lblService_Labor = new System.Windows.Forms.Label();
            this.label3 = new System.Windows.Forms.Label();
            this.btnExit = new System.Windows.Forms.Button();
            this.btnClear = new System.Windows.Forms.Button();
            this.btnCalculateTotal = new System.Windows.Forms.Button();
            this.grpbxOil_Lube.SuspendLayout();
            this.grpbxFlushes.SuspendLayout();
            this.grpbxMisc.SuspendLayout();
            this.grpbxParts_Labor.SuspendLayout();
            this.grpboxSummary.SuspendLayout();
            this.SuspendLayout();
            //
            // grpbxOil_Lube
            //
            this.grpbxOil_Lube.Controls.Add(this.chkbxLubeJob);
            this.grpbxOil_Lube.Controls.Add(this.chkbxOilChange);
            this.grpbxOil_Lube.Location = new System.Drawing.Point(13, 13);
            this.grpbxOil_Lube.Name = \"grpbxOil_Lube\";
            this.grpbxOil_Lube.Size = new System.Drawing.Size(200, 100);
            this.grpbxOil_Lube.TabIndex = 0;
            this.grpbxOil_Lube.TabStop = false;
            this.grpbxOil_Lube.Text = \"Oil && Lube\";
            //
            // chkbxLubeJob
            //
            this.chkbxLubeJob.AutoSize = true;
            this.chkbxLubeJob.Location = new System.Drawing.Point(16, 59);
            this.chkbxLubeJob.Name = \"chkbxLubeJob\";
            this.chkbxLubeJob.Size = new System.Drawing.Size(112, 17);
            this.chkbxLubeJob.TabIndex = 1;
            this.chkbxLubeJob.Text = \"Lube Job ($18.00)\";
            this.chkbxLubeJob.UseVisualStyleBackColor = true;
            //
            // chkbxOilChange
            //
            this.chkbxOilChange.AutoSize = true;
            this.chkbxOilChange.Location = new System.Drawing.Point(16, 19);
            this.chkbxOilChange.Name = \"chkbxOilChange\";
            this.chkbxOilChange.Size = new System.Drawing.Size(120, 17);
            this.chkbxOilChange.TabIndex = 0;
            this.chkbxOilChange.Text = \"Oil Change ($26.00)\";
            this.chkbxOilChange.UseVisualStyleBackColor = true;
            //
            // grpbxFlushes
            //
            this.grpbxFlushes.Controls.Add(this.chkbxTransmissionFlush);
            this.grpbxFlushes.Controls.Add(this.chkbxRadiatorFlush);
            this.grpbxFlushes.Location = new System.Drawing.Point(219, 13);
            this.grpbxFlushes.Name = \"grpbxFlushes\";
            this.grpbxFlushes.Size = new System.Drawing.Size(200, 100);
            this.grpbxFlushes.TabIndex = 1;
            this.grpbxFlushes.TabStop = false;
            this.grpbxFlushes.Text = \"Flushes\";
            //
            // chkbxTransmissionFlush
            //
            this.chkbxTransmissionFlush.AutoSize = true;
            this.chkbxTransmissionFlush.Location = new System.Drawing.Point(19, 59);
            this.chkbxTransmissionFlush.Name = \"chkbxTransmissionFlush\";
            this.chkbxTransmissionFlush.Size = new System.Drawing.Size(157, 17);
            this.chkbxTransmissionFlush.TabIndex = 1;
            this.chkbxTransmissionFlush.Text = \"Transmission Flush ($80.00)\";
            this.chkbxTransmissionFlush.UseVisualStyleBackColor = true;
            //
            // chkbxRadiatorFlush
            //
            this.chkbxRadiatorFlush.AutoSize = true;
            this.chkbxRadiatorFlush.Location = new System.Drawing.Point(19, 19);
            this.chkbxRadiatorFlush.Name = \"chkbxRadiatorFlush\";
            this.chkbxRadiatorFlush.Size = new System.Drawing.Size(136, 17);
            this.chkbxRadiatorFlush.TabIndex = 0;
            this.chkbxRadiatorFlush.Text = \"Radiator Flush ($30.00)\";
            this.chkbxRadiatorFlush.UseVisualStyleBackColor = true;
            //
            // grpbxMisc
            //
            this.grpbxMisc.Controls.Add(this.chkbxTireRotation);
            this.grpbxMisc.Controls.Add(this.chkbxReplaceMuffler);
            this.grpbxMisc.Controls.Add(this.chkbxInspection);
            this.grpbxMisc.Location = new System.Drawing.Point(13, 120);
            this.grpbxMisc.Name = \"grpbxMisc\";
            this.grpbxMisc.Size = new System.Drawing.Size(200, 135);
            this.grpbxMisc.TabIndex = 2;
            this.grpbxMisc.TabStop = false;
            this.grpbxMisc.Text = \"Misc\";
            //
            // chkbxTireRotation
            //
            this.chkbxTireRotation.Location = new System.Drawing.Point(16, 91);
            this.chkbxTireRotation.Name = \"chkbxTireRotation\";
            this.chkbxTireRotation.Size = new System.Drawing.Size(104, 38);
            this.chkbxTireRotation.TabIndex = 2;
            this.chkbxTireRotation.Text = \"Tire Rotation ($20.00)\";
            this.chkbxTireRotation.UseVisualStyleBackColor = true;
            //
            // chkbxReplaceMuffler
            //
            this.chkbxReplaceMuffler.Location = new System.Drawing.Point(16, 55);
            this.chkbxReplaceMuffler.Name = \"chkbxReplaceMuffler\";
            this.chkbxReplaceMuffler.Size = new System.Drawing.Size(104, 30);
            this.chkbxReplaceMuffler.TabIndex = 1;
            this.chkbxReplaceMuffler.Text = \"Replace Muffler ($100.00)\";
            this.chkbxReplaceMuffler.UseVisualStyleBackColor = true;
            //
            // chkbxInspection
            //
            this.chkbxInspection.AutoSize = true;
            this.chkbxInspection.Location = new System.Drawing.Point(16, 19);
            this.chkbxInspection.Name = \"chkbxInspection\";
            this.chkbxInspection.Size = new System.Drawing.Size(117, 17);
            this.chkbxInspection.TabIndex = 0;
            this.chkbxInspection.Text = \"Inspection ($15.00)\";
            this.chkbxInspection.UseVisualStyleBackColor = true;
            //
            // grpbxParts_Labor
            //
            this.grpbxParts_Labor.Controls.Add(this.label2);
            this.grpbxParts_Labor.Controls.Add(this.label1);
            this.grpbxParts_Labor.Controls.Add(this.txtbxLabor);
            this.grpbxParts_Labor.Controls.Add(this.txtbxParts);
            this.grpbxParts_Labor.Location = new System.Drawing.Point(220, 120);
            this.grpbxParts_Labor.Name = \"grpbxParts_Labor\";
            this.grpbxParts_Labor.Size = new System.Drawing.Size(200, 135);
            this.grpbxParts_Labor.TabIndex = 3;
            this.grpbxParts_Labor.TabStop = false;
            this.grpbxParts_Labor.Text = \"Parts and Labor\";
            //
            // label2
            //
            this.label2.AutoSize = true;
            this.label2.Location = new System.Drawing.Point(18, 82);
            this.label2.Name = \"label2\";
            this.label2.Size = new System.Drawing.Size(49, 13);
            this.label2.TabIndex = 3;
            this.label2.Text = \"Labor ($)\";
            //
            // label1
            //
            this.label1.AutoSize = true;
            this.label1.Location = new System.Drawing.Point(36, 34);
            this.label1.Name = \"label1\";
            this.label1.Size = new System.Drawing.Size(31, 13);
            this.label1.TabIndex = 2;
            this.label1.Text = \"Parts\";
            //
            // txtbxLabor
            //
            this.txtbxLabor.Location = new System.Drawing.Point(79, 79);
            this.txtbxLabor.Name = \"txtbxLabor\";
            this.txtbxLabor.Size = new System.Drawing.Size(75, 20);
            this.txtbxLabor.TabIndex = 1;
            //
            // txtbxParts
            //
            this.txtbxParts.Location = new System.Drawing.Point(79, 28);
            this.txtbxParts.Name = \"txtbxParts\";
            this.txtbxParts.Size = new System.Drawing.Size(75, 20);
            this.txtbxParts.TabIndex = 0;
            //
            // grpboxSummary
            //
            this.grpboxSummary.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink;
            this.grpboxSummary.Controls.Add(this.lblTotalFees);
            this.grpboxSummary.Controls.Add(this.label10);
            this.grpboxSummary.Controls.Add(this.lblTax);
            this.grpboxSummary.Controls.Add(this.label8);
            this.grpboxSummary.Controls.Add(this.lblParts);
            this.grpboxSummary.Controls.Add(this.label6);
            this.grpboxSummary.Controls.Add(this.lblService_Labor);
            this.grpboxSummary.Controls.Add(this.label3);
            this.grpboxSummary.Location = new System.Drawing.Point(13, 262);
            this.grpboxSummary.Name = \"grpboxSummary\";
            this.grpboxSummary.Size = new System.Drawing.Size(409, 166);
            this.grpboxSummary.TabIndex = 4;
            this.grpboxSummary.TabStop = false;
            this.grpboxSummary.Text = \"Summary\";
            //
            // lblTotalFees
            //
            this.lblTotalFees.AllowDrop = true;
            this.lblTotalFees.BackColor = System.Drawing.SystemColors.Control;
            this.lblTotalFees.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
            this.lblTotalFees.Location = new System.Drawing.Point(153, 125);
            this.lblTotalFees.Name = \"lblTotalFees\";
            this.lblTotalFees.Size = new System.Drawing.Size(100, 23);
            this.lblTotalFees.TabIndex = 7;
            //
            // label10
            //
            this.label10.AutoSize = true;
            this.label10.Location = new System.Drawing.Point(79, 135);
            this.label10.Name = \"label10\";
            this.label10.Size = new System.Drawing.Size(57, 13);
            this.label10.TabIndex = 6;
            this.label10.Text = \"Total Fees\";
            //
            // lblTax
            //
            this.lblTax.AllowDrop = true;
            this.lblTax.BackColor = System.Drawing.SystemColors.Control;
            this.lblTax.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
            this.lblTax.Location = new System.Drawing.Point(153, 90);
            this.lblTax.Name = \"lblTax\";
            this.lblTax.Size = new System.Drawing.Size(100, 23);
            this.lblTax.TabIndex = 5;
            //
            // label8
            //
            this.label8.AutoSize = true;
            this.label8.Location = new System.Drawing.Point(64, 100);
            this.label8.Name = \"label8\";
            this.label8.Size = new System.Drawing.Size(72, 13);
            this.label8.TabIndex = 4;
            this.label8.Text = \"Tax (on parts)\";
            //
            // lblParts
            //
            this.lblParts.AllowDrop = true;
            this.lblParts.BackColor = System.Drawing.SystemColors.Control;
            this.lblParts.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
            this.lblParts.Location = new System.Drawing.Point(153, 52);
            this.lblParts.Name = \"lblParts\";
            this.lblParts.Size = new System.Drawing.Size(100, 23);
            this.lblParts.TabIndex = 3;
            //
            // label6
            //
            this.label6.AutoSize = true;
            this.label6.Location = new System.Drawing.Point(105, 62);
            this.label6.Name = \"label6\";
            this.label6.Size = new System.Drawing.Size(31, 13);
            this.label6.TabIndex = 2;
            this.label6.Text = \"Parts\";
            //
            // lblService_Labor
            //
            this.lblService_Labor.AllowDrop = true;
            this.lblService_Labor.BackColor = System.Drawing.SystemColors.Control;
            this.lblService_Labor.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
            this.lblService_Labor.Location = new System.Drawing.Point(153, 16);
            this.lblService_Labor.Name = \"lblService_Labor\";
            this.lblService_Labor.Size = new System.Drawing.Size(100, 23);
            this.lblService_Labor.TabIndex = 1;
            //
            // label3
            //
            this.label3.AutoSize = true;
            this.label3.Location = new System.Drawing.Point(54, 26);
            this.label3.Name = \"label3\";
            this.label3.Size = new System.Drawing.Size(82, 13);
            this.label3.TabIndex = 0;
            this.label3.Text = \"Service && Labor\";
            //
            // btnExit
            //
            this.btnExit.Location = new System.Drawing.Point(259, 439);
            this.btnExit.Name = \"btnExit\";
            this.btnExit.Size = new System.Drawing.Size(75, 32);
            this.btnExit.TabIndex = 5;
            this.btnExit.Text = \"Exit\";
            this.btnExit.UseVisualStyleBackColor = true;
            this.btnExit.Click += new System.EventHandler(this.btnExit_Click);
            //
            // btnClear
            //
            this.btnClear.Location = new System.Drawing.Point(166, 439);
            this.btnClear.Name = \"btnClear\";
            this.btnClear.Size = new System.Drawing.Size(75, 32);
            this.btnClear.TabIndex = 6;
            this.btnClear.Text = \"Clear\";
            this.btnClear.UseVisualStyleBackColor = true;
            this.btnClear.Click += new System.EventHandler(this.btnClear_Click);
            //
            // btnCalculateTotal
            //
            this.btnCalculateTotal.Location = new System.Drawing.Point(54, 439);
            this.btnCalculateTotal.Name = \"btnCalculateTotal\";
            this.btnCalculateTotal.Size = new System.Drawing.Size(95, 32);
            this.btnCalculateTotal.TabIndex = 7;
            this.btnCalculateTotal.Text = \"Calculate Total\";
            this.btnCalculateTotal.UseVisualStyleBackColor = true;
            this.btnCalculateTotal.Click += new System.EventHandler(this.btnCalculateTotal_Click);
            //
            // frmAutomotive
            //
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(434, 483);
            this.Controls.Add(this.btnCalculateTotal);
            this.Controls.Add(this.btnClear);
            this.Controls.Add(this.btnExit);
            this.Controls.Add(this.grpboxSummary);
            this.Controls.Add(this.grpbxParts_Labor);
            this.Controls.Add(this.grpbxMisc);
            this.Controls.Add(this.grpbxFlushes);
            this.Controls.Add(this.grpbxOil_Lube);
            this.Name = \"frmAutomotive\";
            this.Text = \"Automotive\";
            this.Load += new System.EventHandler(this.frmAutomotive_Load);
            this.grpbxOil_Lube.ResumeLayout(false);
            this.grpbxOil_Lube.PerformLayout();
            this.grpbxFlushes.ResumeLayout(false);
            this.grpbxFlushes.PerformLayout();
            this.grpbxMisc.ResumeLayout(false);
            this.grpbxMisc.PerformLayout();
            this.grpbxParts_Labor.ResumeLayout(false);
            this.grpbxParts_Labor.PerformLayout();
            this.grpboxSummary.ResumeLayout(false);
            this.grpboxSummary.PerformLayout();
            this.ResumeLayout(false);

        }

        #endregion

        private System.Windows.Forms.GroupBox grpbxOil_Lube;
        private System.Windows.Forms.CheckBox chkbxLubeJob;
        private System.Windows.Forms.CheckBox chkbxOilChange;
        private System.Windows.Forms.GroupBox grpbxFlushes;
        private System.Windows.Forms.CheckBox chkbxTransmissionFlush;
        private System.Windows.Forms.CheckBox chkbxRadiatorFlush;
        private System.Windows.Forms.GroupBox grpbxMisc;
        private System.Windows.Forms.CheckBox chkbxTireRotation;
        private System.Windows.Forms.CheckBox chkbxReplaceMuffler;
        private System.Windows.Forms.CheckBox chkbxInspection;
        private System.Windows.Forms.GroupBox grpbxParts_Labor;
        private System.Windows.Forms.Label label2;
        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.TextBox txtbxLabor;
        private System.Windows.Forms.TextBox txtbxParts;
        private System.Windows.Forms.GroupBox grpboxSummary;
        private System.Windows.Forms.Label lblTotalFees;
        private System.Windows.Forms.Label label10;
        private System.Windows.Forms.Label lblTax;
        private System.Windows.Forms.Label label8;
        private System.Windows.Forms.Label lblParts;
        private System.Windows.Forms.Label label6;
        private System.Windows.Forms.Label lblService_Labor;
        private System.Windows.Forms.Label label3;
        private System.Windows.Forms.Button btnExit;
        private System.Windows.Forms.Button btnClear;
        private System.Windows.Forms.Button btnCalculateTotal;
    }
}

Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;

namespace JoesAutomotive
{
    static class Program
    {
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new frmAutomotive());
        }
    }
}