Please show excel formulas

Dog Up! Franks is looking at a new sausage system with an installed cost of $385,000. 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 $60,000. The sausage system will save the firn $135,000 per year in pretax operating costs, and the system requires an initial investment in net working capital of $35,000. If the tax rate if 71 nerrant and tha discmunt rata is 1n nerrant what is tha MIDW af this nrmiart? to answer this question. Taxes on the salvage value should be negative for a tax liability and positive for a tax