单选题 A merchant purchased a jacket for ＄60 and then determined a selling price that equaled the purchase price of the jacket plus a markup that was 25 percent of the selling price．During a sale，the merchant discounted the selling price by 20 percent and sold the jacket．What was the merchant’s gross profit on this sale?
【正确答案】 C
【答案解析】The purchase price, in dollars, of the jacket was 60. If S represents the selling price, in dollars, then S = 60 + 0.25S, from which S = 80. During the sale, the discounted selling price, in dollars, was 0.8(80) = 64, so the merchant’s gross profit, in dollars, was 64 - 60 = 4.The correct answer is C.