A stereo manufacturer determines that in order to sell x units of a new stereo, the price per unit, in dollars, must be p(x) = 1000 - x. The manufacturer also determines that the total cost (in dollars) of manufacturing x units is given by C(x) = 3000 + 2x. How many units must be sold to maximize the profit? O 250 O 499 O 495 O none ofthe given options