Answer:
Fixed costs are the relatively stable, ongoing costs of operating a business that are not dependent on production levels. They include general overhead expenses such as salaries and wages, building rental payments or utility costs. Variable costs, meanwhile, are those directly related to, and that vary with, production levels, such as the cost of materials used in production or the cost of operating machinery in the process of production.
Total production costs include all the expenses of producing products at current levels. As an example, a company that makes 150 widgets has production costs for all 150 units it produces. The marginal cost of production is the cost of producing one additional unit.
