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 19 % 10 % (a) (b) X 16 % 0.75 33 % 1.5 14 % 20 % (d) (e) 15 % 2.2 Determine the missing items identified by the letters as shown above. If required, round your answers to two decimal places. (a) % % (d) %