The total cost (in hundreds of dollars) to produce x units of perfume is C(x) = 2x - 1 9x+2 (a) Find the average cost function. (b) Find the marginal average cost function. (c) Find the average cost and the marginal average cost for a production level of 35 units. Interpret your results. (a) The average cost function is C(x) = (b) The marginal average cost function is c'(x) = (c) The average cost for 35 units is (Round to the nearest cent as needed.) Interpret your results. per unit. The marginal average cost for 35 units is $ When 35 units are produced, the average cost is $ per unit and the average cost is (Round to the nearest cent as needed.) at a rate of about $ per unit.