Elgin Restaurant Supplies is analyzing the purchase of manufacturing equipment that will cost $21,000. The annual cash inflows are as follows. Use Appendix D. Year Cash Flow 1 $10,000 2 9,500 3 7,500 a. Determine the IRR using interpolation. (Round the intermediate calculations to the nearest whole dollar. Round the final answer to 2 decimal places.) IRR % b. With a cost of capital of 13 percent, should the machine be purchased? Yes No c. With information from part b, compute the PI. (Round the final answer to 3 decimal places.) PI