"if c(x) is the cost of producing x units of a commodity, then the average cost per unit is c(x) = c(x)/x. consider the cost function c(x) given below. c(x) = 24,000 + 280x + 6x3/2 (a) find the total cost at a production level of 1000 units. (round your answer to the nearest cent.) $ (b) find the average cost at a production level of 1000 units. (round your answer to the nearest cent.) $ per unit (c) find the marginal cost at a production level of 1000 units. (round your answer to the nearest cent.) $ per unit (d) find the production level that will minimize the average cost. (round your answer to the nearest whole number.) units"