1) A company manufactures automatic transmissions for cars. The total weekly cost (in dollars) of producing x transmissions is given by C(x) = 50,000+ 600x - 0.75x2 (A) Find the marginal cost function. (B) Find the marginal cost at a production level of 200 transmissions per week. (C) Interpret the results of part B. (D) Find the exact cost of producing the 201st transmission. 2) If the marginal cost of producing x units of a commodity is given by C'(x) = 0.25x2 -4x and the fixed cost is $2,500, find: (A) the cost function C(x) and (B) the cost of producing 20 units