HELP ASAP The final cost of a bookstore purchase with a $5 coupon in a state that charges 8% sales tax is given by this expression. The variable x represents the amount of the purchase before the sales tax and the coupon are applied.

1.08(x−5)

What does (x−5) represent?

the total charge after tax

the cost before applying the coupon

the total charge before applying sales tax

the rate at which the total cost increases