A) a 10 year truck that has initial (time 0) price/cost $25,000, annual maintenance cost of $1000/year and salvage value in year/time 10 of $6000, or B) a 15 year truck that has initial (time 0) price/cost of $28,000, annual maintenance cost of $1500/year, and salvage value in year/time 15 of $3000. All cash flows are after tax. Discount rate = 10%.