A software store has put some of its inventory on sale. Games are marked down by 15%, and security programs are marked down by 18%. If you pay $35.70 each for two games and $22.96 for a security program, how much have you saved?

The game prices are 85% of their original prices because they were discounted by 15%. Each game originally cost $35.70 ÷ 0.85 = $42, so the savings on two games are 2 × ($42 − $35.70) = $12.60. The security program’s original price was $22.96 ÷ 0.82 = $28, so you saved $28 − $22.96 = $5.04 on it. Total savings are $12.60 + $5.04 = $17.64, choice A.

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