The management of Indiana Corporation is considering the purchase of a new machine costing $400,000. The company's desired rate of return is 10%. The present value factors for $1 at compound interest of 10% for 1 through 5 years are 0.909, 0.826, 0.751, 0.683, and 0.621, respectively. In addition to the foregoing information, use the following data in determining the acceptability of this investment: Operating Year Income Net Cash Flow 1 $100,000 $180,000 2 60,000 120,000 3 30,000 100,000 4 10,000 90,000 5 10,000 90,000 The average rate of return for this investment is Oa. 21% Ob. 18% c. 53% Od. 10%