The cost in dollars of an item including tax is given by C
     The cost, in dollars, of an item including tax is given by C = P + (.065P), where P is the price of the item before tax. What is the cost of an item, including tax, if the price before tax is $24.99?  $1.62  $25.64  $26.61  $26.65 
  
  Solution
C = P + (0.065*P)
Given that
P = price before tax = $24.99
C = price including tax
C = 24.99 + 0.065*24.99 = 26.61
So, price including tax = $26.61
Correct option is C.

