What are the principles that must be adhered to in estimating After-Tax Incremental Casht Flows? Basket Wonders (BW) is considering the purchase of a new basket weaving machine

What are the principles that must be adhered to in estimating After-Tax Incremental Casht Flows? Basket Wonders (BW) is considering the purchase of a new basket weaving machine. The machine will cost $50,000 plus $20,000 for shipping and installation and falls under the 3-year MACRS class. NWC will rise by $5,000. Lisa Miller forecasts that revenues will increase by $110,000 for each of the next 4 years and will then be sold (scrapped) for $10,000 at the end of the fourth year, when the project ends. Operating costs will rise by $70,000 for each of the next four years. BW is in the 40% tax bracket