Your firm needs a machine which costs $270,000, and requires $42,000 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 21% and a discount rate of 16%. What is the depreciation tax shield for this project in year 3?

Your firm needs a machine which costs $100,000, and requires $31,000 in maintenance for each year of its 5 year life. After 5 years, this machine will be replaced. The machine falls into the MACRS 5-year class life category. Assume a tax rate of 21% and a discount rate of 12%. What is the depreciation tax shield for this project in year 5?

Your firm needs a machine which costs $280,000, and requires $43,000 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 21% and a discount rate of 13%. If this machine can be sold for $28,000 at the end of year 3, what is the after tax salvage value?