Elgin Restaurant Supplies is analyzing the purchase of manufacturing machine that will cost $38,000. The annual cash inflows are as follows. Use Appendix D. Year 1 2 w NP Cash Flow $19,000 18,000 15,500 3 a. Determine the IRR using interpolation. (Do not round PV factor. Round other intermediate calculations to the nearest whole dollar. Round the final answer to 2 decimal places.) IRR % b. With a cost of capital of 15 percent, should the machine be purchased? Yes c. With information from part b, compute the Profitability Index. (Do not round PV factor. Round other intermediate calculations to the nearest whole dollar. Round the final answer to 3 decimal places.) Profitability Index