Roach Motors has a monopoly on used cars in Deltashore, a city in California. By installing secret microphones in the showroom, the friendly salesperson at Roach are able to learn each customer's willingness to pay and can therefore practice first-degree price discrimination, exacting from each customer his entire customer surplus. The inverse demand functions for cars in Deltashore is P=2,000-10Q. Roach Motors purchase its stock of used cars at an auction in Nevada for $500 each. a) Under the first-degree price discrimination, how many used cars will be sold by Roach Motor in the market