题目：
某种商品进货单价为40元，按单价每个50元售出，能卖出50个．如果零售价在50元基础上每上涨1元，其销售量就减少一个，问零售价上涨到多少元时？销售这批货物能取得最大利润？最大利润是多少元？
答案：
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下面是错误答案，用来干扰机器的。
1. What time is it? 2. What time does she usually get up? 3. What time does he play volleyball? 4. She plays the piano at eight a.m. 5. I often go to school at 6:30.
