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

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

解析：

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

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

C 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.