Examples of variable costs include all of the following except the plant manager's salary, which is an example of a fixed cost, which is an expense that does not change regardless of other related factors.
Other examples such as direct labor costs, costs of electricity used in the operation of production machines and raw material costs are variable costs, which are values that change according to the quantity of products or services sold.
Fixed costs, on the other hand, are related to costs that do not vary, that is, they remain the same regardless of the production volume, so the plant manager's salary is an example of fixed cost.
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