George is going to replace his car in 3 years when he graduates, but now he needs a radiator repair. The local shop has a used radiator, which will be guaranteed for 2 years, or they can install a new one, which is "guaranteed for as long as you own the car." The used radiator is $250 and the new one is $450. If George assumes the used radiator will last 3 years, but will need to be replaced so he can sell the car, which should he buy? Develop a choice table for interest rates from 0% to 50%. George's interest rate on his credit card is 20%.