Salad Inc is looking at a new salad vending system with an installed cost of $625,000. This cost will be depreciated straight-line to zero over the project's five-year life, at the end of which the salad vending system can be scraped for $95,000. The salad vending system will save the company $183,000 per year in pre-tax operating costs, and the system requires an initial investment in net working capital of $41,000. The tax rate is 34% and the discount rate is 8%. 1) What is the NPV? 2) What is the IRR? 3) /hat is the payback? 4) Is this a project in which the company should invest? Why