Doris Co. is considering purchasing a new machine which will cost $200,000, but which will decrease cash expenses each year by $20,000. The useful...

Doris Co. is considering purchasing a new machine which will cost $200,000, but which will decrease cash expenses each year by $20,000. The useful life of the machine is 10 years. The machine would be depreciated straight-line with no residual value over its useful life at the rate of $20,000 per year. The payback period is a. 5.0 years b. 4.0 years c. 10.0 years d. 4.5 years