Within the relevant range, variable costs can be expected to:

A) vary in total in direct proportion to changes in the activity level.
B) remain constant in total as the activity level changes.
C) increase on a per unit basis as the activity level increases.
D) increase on a per unit basis as the activity level decreases.

Variable Costs

Expenditures that fluctuate directly in relation to the amount of goods or services produced.

Relevant Range

The relevant range is a level of activity within which assumptions about variable and fixed cost behaviors are valid, used for budgeting and forecasting.

Activity Level

A measure of the volume of work or operations in a company, influencing variable costs and often used for budgeting and performance evaluation.