represents the total production cost of a car manufacturer. Which of the following statements correctly describes the cost of production? Question 4Select one: a. The average cost is constant and is $4,000. b. The total production cost when producing 20 cars is $80,000 less the fixed costs. c. The average cost when producing 60 cars is $240,000. d. The average cost increases and then decreases as total output increases. e. The marginal cost increases as total output increases