Determining missing items in return on investment computation One item is omitted from each of the following computations of the return on investment: Return on Investment Profit Margin Investment Turnover 18 % 10 % (a) 0.75 (b) = 24 % X 15 % = (c) 1.5 10 % 20 % (d) (e) = 15 % 1.2 Determine the missing items identified by the letters as shown above. If required, round your answers to two decimal places. (a) (b) % (c) % (d) III (e) %