A salesperson earns a base salary of 2240 per month and a co

A salesperson earns a base salary of $2,240 per month and a commission of 5.6% on the amount of sales. If the salesperson has a paycheck of $4,883.20 for one month, what was the amount of sales for the month?

let x be the total sales
S= 2240 + 0.056x
4,883.2 = 2240 + 0.056x

2643.2 = 0.056x
x=2643.2/0.056x
x=$47200