Answer:
Margin of safety in dollars divided by total budgeted (or actual) sales in dollars
Explanation:
The formula to compute the margin of safety is shown below:
Margin of safety = Margin of safety in dollars ÷ total budgeted (or actual) sales in dollars
where,
The margin of safety = Total sales - break-even sales
And, the break-even sales (In dollars) = (Total fixed expenses) ÷ (contribution margin ratio)
The contribution margin ratio = (Contribution ÷ sales) × 100
So, the last option is correct and the rest options are wrong.