Exercise 6-17A (Algo) Asset replacement-opportunity cost LO 6-5 Thornton Freight Company owns a truck that cost $36,000. Currently, the truck's book value is $27,000, and its expected remaining useful life is five years. Thornton has the opportunity to purchase for $26,000 a replacement truck that is extremely fuel efficient. Fuel cost for the old truck is expected to be $5,000 per year more than fuel cost for the new truck. The old truck is paid for but, in spite of being in good condition, can be sold for only $18,000. Required Calculate the total relevant costs. Should Thornton replace the old truck with the new fuel-efficient model, or should it continue to use the old truck until it wears out