eBook Calculator 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 InvestmentProfit Margin x Investment Turnover 20 % 10% 24 % 0.75 18% (c)x 20% x 15% 1.5 14 % 1.2 Determine the missing items identified by the letters as shown above. If required, round your answers to two decimal places. ?) (b) 1243 PM 3/30/2018