please answer

A Canadian company is considering the purchase of a $6000 machine for their shop. The machine belongs to an asset Class with d = 0.20. The machine is expected to save $2600 per year over its 8-year life. with no scrap value. The company's tax rate is 30% and its after-tax MARR is 10%. What is the after-tax PW of the machine? (Hint: Use CTF to make the problem easier}