fou must evaluate a proposal to buy a new mating machine. The purchase price of the miling machine, including shipping and installation costs, is $149,000, and the equipment will pe fully depreclated at the time of purchase. The machine would be sosd after 3 years for $81,000. The machine would require a $4,000 increase in net operating warking captal increased inventory less increased accounts payable), There would be no effect on revenues, but pretax labor costs would decline by $36,000 per yeat. The marginal tax rate is 25%, and the WACC is 12%. Also, 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 expendifure should be treated as a terminal cash fow and dealt with at the end of the project's life. Hence, it should not be included in the initial investment outlay. III. Last year's expenditure is considered an opportunity cost and does not represent an incremental cash flow, Hence, it should not be included in the analysis. IV. Last year's expenditure is considered a sunk cost and does not represent an incremental cash flow. Hence, it should not be included in the analysis. V. The cost of research is an incremental cash flow and should be included in the analysis