You have a 1993 Nissan that is expected to run for another 3 years, but you are considering buying a new Hyundai before the Nissan wears out. You will donate the Nissan to Lifeline when you buy the new car. The annual maintenance cost is $1500 per year for the Nissan and $200 for the Hyundai. The price of your favourite Hyundai model is $18000 and it is expected to run for 15 years. Your opportunity cost of capital is 3 per cent. Ignore tax. When should you buy the new Hyundai?