Determining Missing Items in Rate of Return Computation One item is omitted from each of the following computations of the rate of return on investment Rate of Return on Investment - Profit Margin x Investment Turnover 18 % 10 % 28 % 0.75 (c) x 20 % 15 % 15% 16% Determine the missing items identified by the letters as shown above. If required, round your answers to two decimal places