A manufacturer of tennis rackets finds that the total daily cost in dollars, C(q), of producing q rackets is given by C(q) = 18,000 - 10q + .001q 2. Each racket can be sold at a price p in dollars, given by p = 10 - .004q. If all of the rackets that are manufactured can be sold, find the daily level of production (q) that will maximize profit.