Depreciation Tax Shield Your firm needs a computerized machine tool lathe that costs $50,000 and requires $12,000 in maintenance for each year of its three-year life. After three years, this machine will be replaced. The machine falls into the MACRS three-year class life category. Assume a tax rate of 35 percent and a discount rate of 12 percent. Calculate the depreciation tax shield for this project in year 3. (LG12-4)