※ 引述《wayne45678 (小米)》之銘言：
: a furniture showroom expects to sell 250 sofas a year.
: Each sofa costs the store $300,and there is a fixed charge of $500 per order.
: If it costs $100 to store a sofa for a year,how large should each order be and
: how often should orders be placed to minimize inventory costs.
由 Q=√(2D*Cb/Ci)
=√(2*250*100/500)
=10 台/次
則一年需訂購 250/10 = 25 次
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