A company is considering the purchase of a machine. For this he has received two proposals that meet the requested technical requirements. The considerations economic of each machine are the following:

Machine A Machine B

Initial cost $ 60,000 $ 40,000

Maintenance cost in the first year 5,000 8,000

Annual increase in maintenance cost 600 10%

Shelf life (years) 8 4

Salvage Value 6,000 4,000

Considering an interest rate of 5% capitalized annually, what machine would you recommend Use the net present value criterion.