please help!

4 Winnebagel Corp. currently sells 15,600 motor homes per year at $23,400 each, and 6,240 luxury motor coaches per year at $44,200 each. The company wants to introduce a new portable camper to fill out its product line; it hopes to sell 9,880 of these campers per year at $6,240 each. An independent consultant has determined that if the company introduces the new campers, it should boost the sales of its existing motor homes by 2,340 units per year, and reduce the sales of its motor coaches by 468 units per year. What is the amount to use as the annual sales figure when evaluating this project? Dog Up! Franks is looking at a new sausage system with an installed cost of $717,600. This cost will be depreciated straight-line to zero over the project's 3-year life, at the end of which the sausage system can be scrapped for $110,400. The sausage system will save the firm $220,800 per year in pretax operating costs, and the system requires an initial investment in net working capital of $51,520. If the tax rate is 22 percent and the discount rate is 8 percent, what is the NPV of this project