Determining Missing Items in Return Computation One item is omitted from each of the following computations of the return on investment: Rate of Return on Investment = Profit Margin x Investment Turnover 0.75 23 % 10 % x (a) (b) = 16% X 30 % = (c) 12% = 20 % X (e) = 15% x 1.4 Determine the missing items identified by the letters as shown above. If required, round your answers to two decimal places. (d) OSO