Your firm needs a computerized machine tool lathe which costs $50,000, and requires $12,000 in maintenance for each year of its 3 year life. After 3 years, this machine will be replaced. The machine falls into the MACRS 3-year class life category. Assume a tax rate of 35% and a discount rate of 12%. A. Calculate the depreciation tax shield for this project in year 3. B. If the lathe can be sold for $5,000 at the end of year 3, what is the after tax salvage value