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 15 % = 10 % x (a) (b) = 12 % x 0.75 30 % = (c) x 1.5 16 % = 20 % x (d) (e) = 15 % x 1.2 Determine the missing items identified by the letters as shown above. If required, round your answers to two decimal places. (a) (b) % (c) % (d) (e) %