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 16 % 10 % 24 % (a) 0.75 (b) x 1.5 15 % 16 % 20 % (d) 2.2 (e) 15 % Determine the missing items identified by the letters as shown above. If required, round your answers to two decimal places. (a) E O