Turk manufacturing is considering purchasing two machines. each machine costs $9,000 and will produce cash flows as follows: end of year machine a b 1 $ 5,000 $ 1,000 2 4,000 2,000 3 2,000 11,000 turk manufacturing uses the net present value method to make the decision, and it requires a 15% annual return on its investments. the present value factors of 1 at 15% are: 1 year, 0.8696; 2 years, 0.7561; 3 years, 0.6575. which machine should turk purchase?