Profit Margin, Investment Turnover, and ROI Bustamante Company has income from operations of $49,980, invested assets of $210,000, and sales of $714,000. Use the DuPont formula to compute the return on investment and show (a) the profit margin, (b) the investment turnover, and (c) the return on investment. If required, round your answers to two decimal places. a. Profit margin % b. Investment turnover c. Return on investment %