标题: discuz a jj [打印本页] 作者: gconquer 时间: 2003-2-15 11:25 标题: discuz a jj
a factory produce A and mail product to customors, mail fee is 19.xx. Sale price is 29.xx/each. (具体数计不清了）ask: how many the factory sell its product to customor this time?
i, its total revenue this time is between 280 and 315
ii, its total revenue this time is between 300 and 335作者: 12345 时间: 2003-2-15 13:17
mail fee is for each or nothing to do with how many product sold?
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