Answer:
$50,000
Step-by-step explanation:
To calculate the margin of safety we need to calculate the break-even sales revenue first after calculating break-even sales revenue we will deduct that from the total sales revenue.
Total Sales Revenue = $62,500 
 Break-Even Sales Revenue = $12,500 
 Margin of Safety in Dollars = $50,000
Working
Target Income $30000 
 Fixed expenses $7500 
 Contribution margin $37500 
If Variable cost 40% of the sale Contribution margin will be 60% of the sale 
 
Total target Sales Revenue [37500 / 60%] = $62500 
 
Fixed expenses $7500 
 Contribution margin ratio 60% 
 
Break-Even Sale [7500/60%] $12500