Drumpf Country Club has the only golf course in Distopia. The (annual) demand to play a round of golf on its course is given by D (p) = 12000-10p, where D (p) is the number of rounds demanded each year if Drumpf charged a uniform price of p per round. The marginal cost of having someone play a round of golf is zero and the annual (xed) cost of maintaining the golf course is 100000