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 16 % 10% x 20% 0.75 (c)x 20 % 15% 21 96 1.5 10% 1.6 etermine the missing items identified by the letters as shown above. If required, round your answers to two decimal places d)