The following data applies for example problems 8.1 through 8.3. A company is considering the purchase of either machine A or machine B. machine A machine B initial cost $80,000 $100,000 estimated life 20 years 25 years salvage value $20,000 $25,000 other costs $18,000 per year $15,000 per year for the first 15 years $20,000 per year for the next 10 years