Academic book publishers hire editors, designers, and production and marketing managers who prepare books for publication. because these employees work on several books simultaneously, the number of people the company hires will not go up and down with the quantity of books the company publishes during any particular year. the salaries and benefits of people in these job categories will be included in a. fixed cost but not variable cost and total cost. b. marginal cost and total cost but not fixed cost. c. fixed cost and marginal cost but not variable cost. d. fixed cost and total cost but not variable cost.

The correct answer is option D.

Explanation:

Academic book publishers hire editors, designers, and production and marketing managers who help prepare books for publication.

These employees work on several books simultaneously so a change in quantity demanded of books published in a year.

Since the number of people employed is fixed and does not change with the quantity of output. The cost incurred on these workers will be fixed cost. So the salaries and benefits of people in these people will be included in fixed costs and total costs. But since it does not change with change in the output it will not be included in variable costs.