Determining missing items in return on investment computation One item is omitted from each of the following computations of the return on investment: Return on Investment Profit Margin Investment Turnover 28 % = 10 % X (a) (b) 28 % X 0.75 27 % (c) 1.5 14 % 20 % (d) (e) 15 % x 1.6 Determine the missing items identified by the letters as shown above. required, round your answers to two decimal places. (a) (b) % (c) % (d) @