Which of the following is the correct interpretation of a degree of operating leverage of $5?$

Operating leverage of $5$ means that sales can decrease by $5\%$ before the firm's current level of sales will hit the break$-$even point.

Operating leverage of $5$ means that if sales increase by $5\%$ the firm will hit its break$-$even point.

Operating leverage of $5$ means that if sales increase by $5\%,$ there will be a $25\%$ increase in the firm's income.

Operating leverage of $5$ measures the degree of debt employed by the firm's debt structure.

Operating leverage of $5$ means that the company would need to increase sales by $5$ times in order to hit its break$-$even point.