The information below applies to a product. Data per unit: Selling price = $\$25$ Variable costs = $\$15$ Contribution per unit = $\$10$ Output is $50\,000$ units. Fixed costs amount to $\$300\,000$. Margin of safety = $20\,000$ units. The directors plan to raise the unit selling price by $10\%$. What is the percentage increase in the margin of safety?
- A$13.6\%$
- B$20\%$
- C$30\%$
- D$36.4\%$