The answer is: Earn a profit
Marginal cost refers to additional cost that occurred after supplying one additional product. Market price refers to the price point needed to obtain a certain goods or services.
This means that if supplying the car only cost you $ 20,000. But from that, you could obtain $25,000 from sales. This mean that supplying the car would provide you with incentives in the form of profit for $ 5,000