Answer:
B. the excess of sales over the break-even volume of sales.
Explanation:
The formula to compute the margin of safety is shown below:
The margin of safety = Expected sales - break-even sales
where,
Expected sales = Selling price per unit × Unit sales
And, the break-even sales equal to
= (Fixed cost) ÷ (Contribution margin Ratio)
where,
Contribution margin per unit = Selling price per unit - Variable expense per unit