ou must evaluate a proposal to buy a new milling machine. The purchase grice of the milling mach ine, including shipping and installation costs, is s141,000, and the equipment vill be fully depreciated at the time of purchase. The machine would be sold after 3 years for $53,000. The machine would require a 56 , 000 increase in net operating working capital (increased Inventory loss increased accounts payable). There would be no effect on revenues, but pretax labor costs would decine by $50,000 per year. The marginal tax ate is 25\%, and the WACC is 10%. Aso, the firm spent $4,500 last year investigating the feasibility of using the machine. a. How should the $4,500 spent last year be handled? 1. Only the tax effect of the research expenses should be included in the analysis. II. Last year's expenditure should be treated as a terminal cash flow and dealt with at the end of the project's life. Hence, it should not be included in the initial investment outay. III. Last year's expenditure is considered an opportunity cost and does not represent an incremental cash fiow. Hence, it should not be included in the analysis. tV. Last year's expenditure is considered a sunk cost and does not represent an incremental cash flaw. Hence, it should not be inctuded in the analysis. V. The cost of research is an incremental cash flow and should be inctuded in the analysis