How does variable cost affect the breakeven sales change?

Variable costs directly impact the breakeven sales level since they are part of the total cost structure that needs to be covered. If variable costs increase, the total costs rise, leading to a higher breakeven point, meaning more sales are required to cover these costs. Conversely, a decrease in variable costs lowers the total costs and reduces the breakeven sales required. Therefore, fluctuations in variable costs can significantly alter the sales volume needed to achieve breakeven.