return on sales的公式是什么？

问题如下：

Question In a period of rising prices, when compared with a company that uses weighted average cost for inventory, a company using FIFO will most likely report higher values for its:

选项：

A.inventory turnover.

B.return on sales.

C.debt-to-equity ratio.

解释：

B is correct. In periods of rising prices, FIFO results in a higher inventory value and a lower cost of goods sold and thus a higher net income. The higher net income increases return on sales. The higher reported net income also increases retained earnings and thus results in a lower debt-to-equity ratio, not a higher one. The combination of higher inventory and lower cost of goods sold (CGS) decreases inventory turnover (CGS/Inventory).

A is incorrect. The combination of higher inventory and lower cost of goods sold decreases inventory turnover (CGS/Inventory).

C is incorrect. The higher reported net income increases retained earnings and therefore results in a lower debt-to-equity ratio, not a higher one.