Answer:
b. Buy new car because EUAC of challenger is $4,904 and EUAC defender is $5,111.
Step-by-step explanation:
If the used car is kept its current worth is $7,500. The maintenance for next two years will be $1,800 and $2,000. The total maintenance expense for next two years will be 3,800. The net book value for car after two years will be $7,500 - 3,800 = 3,700.
The car can then be sold for $3,000. There will be net loss of $700 value of the car. The new car cost $22,000 but all maintenance cost is saved. The best option then is to buy new car.