You are asked to help TEPCO in selecting the most economical machine type for the coming couple of decades. Their MARR is equal to 15%. Two types of machines are being considered and the following cost estimates have been acquired.
Machine Types A B
Service Life 4 years 6 years
First Cost $10,000 $15,000
Salvage Value $0 $2,000
Annual Costs $800 in year 1, increasing by $1,000 each year thereafter $800 in year 1, increasing by $200 each year thereafter