Cait purchases a $20 item at a store. She uses a coupon to receive a 15% discount, and she pays a 6% sales tax on the item. She calculates the total cost, in dollars, of the item using the expression shown. Cait’s expression: (1.15)(1.06)(20)

A. Describe the error in the expression cait used for her calculation.

B. Show or explain how you would calculate the total cost of caits purchase.