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 x Investment Turnover 13.2% 6% x (a) (b) 10% 1.80 x 10.5% x 1.50 (C) 5% 15% x (d) (e) 12% x 1.10 Determine the missing items identified by the letters as shown above. If required, round your answers to two decimal places. %