Question

Greg purchased supplies for a party. He had a coupon good for 30% off. He purchased a helium tank rental with an original price of $31.61, a sheet cake with an original price of $18.44, a punch bowl with an original price of $12.78, and paper decorations with an original price of $23.69. Greg’s total came to $80.99. To which item did Greg apply his coupon?
a.
cake
b.
helium tank rental
c.
paper decorations
d.
punch bowl

Answer 1

Total original = 31.61 + 18.44 + 12.78 + 23.69 = 86.52.
Discounted total = 86.52 − 0.30·(item price) = 80.99 so 0.30·(item price) = 5.53 ⇒ item ≈ 5.53/0.30 = 18.44.
That matches the cake. Answer: a. cake.