Assume that a company is considering purchasing a machine for $40,000 that will have a five-year useful life and no salvage value. The machine will lower operating costs by $17,000 per year. The company's required rate of return is 18%. The profitability index for this investment is closest to: Click here to view Exhibit 12B-1 and Exhibit 12B-2, to determine the appropriate discount factor(s) using the tables provided. Multiple Choice 0.75. 1.29. 1.33. 1.39.