need help. this answer is wrong

The Elite Car Rental Corporation is contemplating expanding its short-term rental fleet by 30 automobiles at a cost of $900.000. It expects to keep the autos for only two years and to sell them at the end of that period for 60 percent, on average, of what they cost. The plan is to generate $21,000 of incremental revenue per additional auto in each year of operation. The controller estimates that other costs will amount to 20 cents per kilometre on an average of 40,000 kilometres per car per year. She also estimates that the new business will require an investment of $10,000 in additional working capital. The firm is in a 30 percent tax bracket and uses 12 percent as a cost of capital. a. Calculate the NPV. (Do not round the intermediate calculations. Round the final answer to the nearest whole dollar. Negative answer should be indicated by a minus sign. Omit $ sign in your response.) NPV b. Should Elite purchase the automobiles? Yes No