What type of costs do not change with production volume?

Fixed costs are expenses that remain constant regardless of the level of production or sales. This means that whether a company produces a high volume of goods or very few, the total fixed costs, such as rent, salaries of permanent staff, and insurance, do not fluctuate.

In contrast, variable costs change in direct relation to production levels. These include costs such as raw materials or direct labor, which increase as more products are produced. Operating costs can encompass both fixed and variable costs, making this answer less precise. Direct costs are associated specifically with a product or service and can include variable costs. Therefore, fixed costs are clearly defined as unchanged by production volume, making them the correct choice.