Joan has a choice of purchasing a car for $20,000 with 9.7 percent interest cost to borrow and a three-year repayment period for leasing the vehicle. Leasing the auto would cost $300 a month for a three-year term. The sales tax is 6 percent. The car is expected to have a value of $14,000 at the end of the leasing period. Joan can obtain 7 percent after tax on similar marketable investments. Should she lease or buy the car?