Suppose you have $60,000 right now. You need a new car, but you also want to start saving for retirement. You figure that you can afford $600 a month for either. If the car you want to purchase is available at $24,000, would you be better off in 20 years if you paid cash for the car and invested all of your money at 7%, or financed the car (5.9% financing for 60 months) and contributed only the excess money to the IRA for the first 5 years, then contributed the full $600 for the remaining 15?