Dog Up! Franks is looking at a new sausage system withan installed cost of $540,000. This cost will be depreciated straight-line to zero over the project's five-year life, at the end of which the sausage system can be scrapped for $80,000. The sausage system will save the firm $170,000 per year in pretax operating costs, and the system requires an initial investment in net working capital of $29,000. If the tax rate is 34 percent and the discount rate is 10 percent, what is the NPV of this project?

Here are my calculations thus far:

Installation cost 540000

Scrapped Vale 80000

Savings per year 170000

Working capital 29000 T

tax rate 34%

Discount rate 10%

Annual Depreciation 108000

Salvage value after tax 52800

EBIT 170000

Less: annual depreciation 62000

Less: taxes @ 34% 21080

I'm stumped as to how to calculate the cash flow for 0, 1,2,3,4,5 years . HELP!!