It is questionable as to what impact does online sales and marketing have on the actual cost of components or the total bill of materials.

至于在网上做销售和市㘯营销对元器件实际成本，或者说总材料帐单有什么影响，值得责疑。

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Studies have suggested, though the actual input expenses of design phase only account for 5% of the total cost of the product, but has determined 70% - 80% cost of product.

研究表明，设计阶段的实际投入费用虽然只占产品总成本的5%，但是却决定了70%—80%的产品成本。

youdao

Studies have suggested, though the actual input expenses of design phase only account for 5% of the total cost of the product, but has determined 70% - 80% cost of product.

研究表明，设计阶段的实际投入费用虽然只占产品总成本的5%，但是却决定了70%—80%的产品成本。

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