Robbie's Repair Shop has a monthly target profit of $31,000. Variable costs are 20% of sales, and

Question:

Robbie's Repair Shop has a monthly target profit of $31,000. Variable costs are 20% of sales, and monthly fixed costs are $19,000.
Requirements
1. Compute the monthly margin of safety in dollars if the shop achieves its income goal.
2. Express Robbie's margin of safety as a percentage of target sales.
3. Why would Robbie's management want to know the shop's margin of safety?