We are pleased to notify you that the whole of their extensive stock of silks velvets, ribbons, mantles, shawls, woollen and cotton goods. haberdashery, is now on sale at prime cost.
The derivative at the cost smallest, the profit biggest, and the application of the wholesale quantity lowest in the production output is the illustration in this aspect.
导数概念在成本最小、利润最大、批量费用最低时生产量确定方面的应用就是这方面的例证。
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The cost control of the whole process from product development and delivery of products to after-sale service is realized with the cost control system.