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计算本章以表4-2所举的轴承台套例4-1中的每次订货的最佳供应天数(计算时以每年365天基准)。提示：每年库存保管费用 = 年订货费用，最佳供应天数 = 365/最佳订货次数
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试题答案：
计算最佳供应天数可以转变为计算订货次数
所以，先求解最佳订货次数，也就是书上59页的例题了。
可得 最佳订货次数为5次
所以：最佳供应天数 = 365/5 = 73天
答案解释：
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