[, ] ( EOQ) () the best amount of sth to order that is enough for what you need and keeps all the costs involved, such as the cost of storing items, as low as possible经济订货量，经济订购量（库存成本最低的最佳订货数量）◆We calculate the economic order quantity for each stock item.我们会计算每种库存商品的经济订货量。