※ 引述《dddaaa ()》之铭言： : A certain business produced x rakes each month form November through February : and shipped x/2 rakes at the beginning of each month from March through : October. The business paid no storage costs for the rakes from November : through February, but it paid storage costs of $0.10 per rake each month from : March through October for the rakes that had not been shipped. In terms of x, : what was the total storage cost, in dollars, that the business paid for the : rakes for the 12 months form November through October? : A. 0.40x : B. 1.20x : C. 1.40x : D. 1.60x : E. 3.20x : 答案是C : 请高手解答 感谢 这一间公司一个月制造X个rake 从11月到2月一共制造了4*x=4x个rake 从三月开始卖,但不继续制造 一个月卖x/2个 所以三月的库存就是4x-(x/2)=3.5x 四月的库存是3.5x-(x/2)=3x 五月的库存是3x-(x-2)=2.5x 依此类推 十月的库存就是0.5x 把三月到十月的库存量加起来再乘上0.1 就是储存费用 --

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