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Consider the following cost function. a. Find the average cost and marginal cost functions. b. Determine the average and marginal cost when x = a. c. Interpret the values obtained in part (b). C(x) = 0.01x +0.6x + 20x + 140, OSxs 1500, a =1000 a. The average cost function is C(x) =. The marginal cost is function is C'(x) = b. The average cost when x = a is $ . (Round to two decimal places as needed.) The marginal cost when x = a is $ .(Round to two decimal places as needed.) c. Choose the correct interpretation of the average cost when x = a. O A. The cost of producing 1000 items is about $9,320.14. O B. The cost of producing the 1001st item is about $1,543.52. O C. The cost of producing the 1001st item is about $31,220.00. O D. The average cost per item is about $10,620.14 when 1000 items are produced. Choose the correct interpretation of the marginal cost when x = a. O A. The cost of producing 1001 items is about $343.52. O B. The average cost per item is about $10,620.14 when 1000 items are produced. O C. The cost of producing the 1001st item is about $31,220.00. O D. The cost of producing 1000 items is about $9,320.14