Which of the following financial indices may be used to infer the typical mark-up percentages...

The financial index that may be used to infer the typical mark-up percentages used by a firm is D. Gross profit margin. The gross profit margin is a financial metric that reflects the percentage of revenue that exceeds the cost of goods sold, which is essentially the mark-up over the cost1. It is used to assess a firm’s financial health by indicating how much profit the company makes for each dollar of sales after paying for the production of the goods.