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?
The original prices add to $86.52, so Greg received a discount of $86.52 − $80.99 = $5.53. Thirty percent of the cake’s $18.44 price is $5.532, which rounds to $5.53. Therefore, he applied the coupon to the cake.
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