3 Ralston Company has income from operations of $75,000, invested assets of $360,000, and sales of $790,000. Required: State the word formula to calculate the return on investment using the DuPont formula and the amounts used to calculate the following: (a) the profit margin, (b) the investment turnover, and (c) rate of return on Investment. The answer window can be expanded by moving the mouse after placing it over the dot triangle in the lower right-hand corner and holding down the left mouse button.