7498 发表于 2011-9-25 19:37
individual customers $40,000/400 = 100 per customer, 再乘以no. of customers, business customers ...
TMAC1 发表于 2011-9-25 21:26
business也说是spent eaqually on customers。。不应该是这两个type of customer平分吧。。而是和individ ...
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