Which of the following costs change in direct proportion to a change in the activity level as volume goes up costs go up at the same rate of change )?

Costs that vary depending on the volume of activity

What are Variable Costs?

Variable costs are expenses that vary in proportion to the volume of goods or services that a business produces. In other words, they are costs that vary depending on the volume of activity. The costs increase as the volume of activities increases and decrease as the volume of activities decreases.

Which of the following costs change in direct proportion to a change in the activity level as volume goes up costs go up at the same rate of change )?

The Most Common Variable Costs

  • Direct materials
  • Direct labor
  • Transaction fees
  • Commissions
  • Utility costs
  • Billable labor

Essentially, if a cost varies depending on the volume of activity, it is a variable cost.

Formula for Variable Costs

Total Variable Cost  =  Total Quantity of Output x Variable Cost Per Unit of Output

Variable vs Fixed Costs in Decision-Making

Costs incurred by businesses consist of fixed and variable costs. As mentioned above, variable expenses do not remain constant when production levels change. On the other hand, fixed costs are costs that remain constant regardless of production levels (such as office rent). Understanding which costs are variable and which costs are fixed are important to business decision-making.

For example, Amy is quite concerned about her bakery as the revenue generated from sales are below the total costs of running the bakery. Amy asks for your opinion on whether she should close down the business or not. Additionally, she’s already committed to paying for one year of rent, electricity, and employee salaries.

Therefore, even if the business were to shut down, Amy would still incur these costs until the year-end. In January, the business reported revenues of $3,000 but incurred total costs of $4,000, for a net loss of $1,000. Amy estimates that February should experience revenues similar to that of January. Amy’s list of costs for the bakery is as follows:

A. January fixed costs:

  • Rent: $1,000
  • Electricity: $200
  • Employee salaries: $500

Total January fixed costs: $1,700

B. January variable expenses:

  • Cost of flour, butter, sugar, and milk: $1,800
  • Total cost of labor: $500

Total January variable costs: $2,300

If Amy did not know which costs were variable or fixed, it would be harder to make an appropriate decision. In this case, we can see that total fixed costs are $1,700 and total variable expenses are $2,300.

If Amy were to shut down the business, Amy must still pay monthly fixed costs of $1,700. If Amy were to continue operating despite losing money, she would only lose $1,000 per month ($3,000 in revenue – $4,000 in total costs). Therefore, Amy would actually lose more money ($1,700 per month) if she were to discontinue the business altogether.

This example illustrates the role that costs play in decision-making. In this case, the optimal decision would be for Amy to continue in business while looking for ways to reduce the variable expenses incurred from production (e.g., see if she can secure raw materials at a lower price).

Example of Variable Costs

Let us consider a bakery that produces cakes. It costs $5 in raw materials and $20 in direct labor to bake one cake. In addition, there are fixed costs of $500 (the equipment used). To illustrate the concept, see the table below:

Which of the following costs change in direct proportion to a change in the activity level as volume goes up costs go up at the same rate of change )?

Note how the costs change as more cakes are produced.

Break-even Analysis

Variable costs play an integral role in break-even analysis. Break-even analysis is used to determine the amount of revenue or the required units to sell to cover total costs. The break-even formula is given as follows:

Break-even Point in Units  =  Fixed Costs / (Sales Price per Unit – Variable Cost per Unit)

Consider the following example:

Amy wants you to determine the minimum units of goods that she needs to sell in order to reach break-even each month. The bakery only sells one item: cakes. The fixed costs of running the bakery are $1,700 a month and the variable costs of producing a cake are $5 in raw materials and $20 of direct labor. Additionally, Amy sells the cakes at a sales price of $30.

To determine the break-even point in units:

Break-even Point in Units = $1,700 / ($30 – $25) = 340 units

Therefore, for Amy to break even, she would need to sell at least 340 cakes a month.

Video Explanation of Costs

Watch this short video to quickly understand the main concepts covered in this guide, including what variable costs are, the common types of variable costs, the formula, and break-even analysis.

Thank you for reading CFI’s guide to Variable Costs. To keep advancing your career, the additional resources below will be useful:

  • Cost Structure
  • Projecting Balance Sheet Items
  • Analysis of Financial Statements
  • Cost Behavior Analysis

Which of the following costs changes in direct proportion to a change in the activity level?

Variable costs vary in direct proportion to changes in the activity base. Fixed costs do not vary with the change in activity base. Fixed costs may be committed or discretionary.

Which costs changes in direct proportion to a change in volume?

Answer and Explanation: A cost that changes in proportion to changes in volume of activity is called c) a variable cost. Variable costs are those tied directly to production and rise and fall depending on what work a business does.

Which of the following costs are expenses that change in proportion to the activity of a business?

Variable costs are any expenses that change based on how much a company produces and sells. This means that variable costs increase as production rises and decrease as production falls. Some of the most common types of variable costs include labor, utility expenses, commissions, and raw materials.

Which of the following is a cost that changes as the level of activity changes?

Variable costs: A variable cost increases or decreases as volume of activity increases or decreases. On a per unit basis, a variable cost per unit remains constant but the total amount of variable cost changes with the level of production. When production volume and variable costs are graphed, a.