st of producing the 50th product is $6.20, it cost $6.20 to incr oduction from 49 to 50 units of output. Suppose the marginal (in dollars) to produce x thousand mp3 players is given by the nction C(x) = x x - 120x+7300. How many players should be produced to minimize the arginal cost? What is the minimum marginal cost? To minimize the marginal cost, thousand mp3 players sl e produced. The minimum marginal cost is $