Machine A costs $38,000 to purchase and is worth $8,000 in 6
years at the end of its service life. Machine B costs $17,000 to
purchase and is worth $3,000 in 3 years at the end of its service
life. Assume that these machines are needed for 18 years (required
service period). Each machine can be repurchased at the same price
in the future, and assume the annual maintenance cost of each
machine is negligible. Use 11% annual interest rate....