129: At the begining of last month, a stationery store had in stock 250 writing Pads, which had cost the store $0.75 each. During the same month, the store made only one purchase of writing pads. What was the total amount spent by the store on the writing pads it had in stock at the end of last month? (1) Last month the store purchased 150 writing pads for $0.8 each. (2) ) Last month the total revenue from the sale of writing pads was $180.
I think it's E. A doesn't tell you whether there are some writing pads being sold or not; in B, revenue = each item's price * sold items, you can't get the number of sold items, neither the item's selling price. Since we still can't get how many items were sold, the total amount spent by the store at the end of last month = total cost - sold items' cost can't be known.
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发表于 2003-3-24 23:23:00
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