The total cost (in dollars) of producing x college textbooks is C(x)=40x+29,000. (a) What are the fixed costs? (b) What is the marginal cost per book? (c) What is the total cost of producing 500 books? 37,000 books? (d) What is the average cost when 500 books are produced? when 37,000 books are produced? Question content area bottom Part 1 (a) The fixed costs are $enter your response here. (Simplify your answer.) Part 2 (b) The marginal cost per book is $enter your response here. (Simplify your answer.) Part 3 (c) The total cost of producing 500 books is $enter your response here. The total cost of producing 37,000 books is $enter your response here. (Simplify your answers.) Part 4 (d) The average cost when 500 books are produced is $enter your response here. The average cost when 37,000 books are produced is $enter your response here. (Type integers or decimals rounded to two decimal places as needed.)