Silvi has a coupon for $5 off any one item at her favorite store. She must pay 6% sales tax on the discounted price. Which of the following functions represents Silvi's final cost, c, for an item with an original price of x dollars?
O c(x) = 0.94x - 5
O c(x) = 0.94(x - 5)
O c(x) = 1.06x - 5
O c(x) = 1.06(-5)
Please help