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题目表述可能会引起误解。在计算资金时，不管原始资金时多少，题目意思是直接减去commission，得到的差再乘于rate就行。 题中的举例(100 - 0.39) * 29.75 = 2963.3975原始资金恰好是100，而commission范围也恰好是(10^-2,10^2)。因此我开始理解成了利用commission计算一个扣除比率，比如commission=30，那么扣除率就是30%。真是自作聪明Orz。 Followed by:
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