Which ratio provides a measure of how well a company turns sales into profits?

The "Return on Sales" (ROS) ratio, also known as the net profit margin, is a key profitability metric. It is calculated by dividing a company's net income by its total sales revenue (Net Income / Sales). This ratio directly measures how much profit is generated for each dollar of sales. A higher ROS indicates that a company is more efficient at converting its revenue into actual profit, reflecting strong operational efficiency and pricing power.

B. Return on costs: This is not a standard financial ratio. Ratios typically measure returns relative to sales, assets, or equity, not costs.

C. Return on expenses: Similar to "return on costs," this is not a recognized financial metric for measuring profitability from sales.

D. Return on profit: This is a nonsensical phrase. A "return" is a measure of gain or loss relative to an investment or base figure like sales, not relative to itself.

1. Ross, S. A., Westerfield, R. W., & Jordan, B. D. (2018). Fundamentals of Corporate Finance (12th ed.). McGraw-Hill Education. Chapter 3, "Working with Financial Statements," defines the Profit Margin (Return on Sales) as Net Income / Sales and describes it as a measure of the firm's operating efficiency.

2. Brigham, E. F., & Houston, J. F. (2018). Fundamentals of Financial Management (15th ed.). Cengage Learning. Chapter 4, "Analysis of Financial Statements," presents the profit margin on sales as a primary measure of profitability.

3. MIT OpenCourseWare. (2015). 15.501 Corporate Financial Accounting, Fall 2015. Lecture Notes, Session 12: Financial Statement Analysis. The notes list Profit Margin (Net Income/Sales) as a key profitability ratio that measures "how well the company is controlling its expenses relative to its sales."