General corporate costs 不是都是vc么 哪里不对呢

问题如下：

Which of the following statements about forecasting selling, general and administrative (SG&A) expenses is most accurate?

选项：

A.

General corporate costs are mostly variable costs

B.

Selling and distribution expenses can be modeled as a percentage of sales

C.

Overall SG&A expenses have a more direct relationship with revenues than cost of goods sold

解释：

Because selling and distribution expenses often have a large variable component and can be modeled as a percentage of sales.

A is incorrect because general corporate costs are more fixed costs and might be better modeled using a fixed growth rate based on expected wage inflation.

C is incorrect because cost of sales (cost of goods sold, or COGS) is typically the single largest cost for companies that make and/or sell products. Because it has a direct link with sales, forecasting this item as a percentage of sales (or as a gross margin) is usually a good approach. SG&A expenses often have a less direct relationship with revenues. Although SG&A expenses overall are generally less closely linked to revenue than is cost of sales, certain SG&A expenses could be more variable than others.