Vera is a violin music teacher. Vera charges $50 per lesson. The variable costs include labour and sheet music, a total of $20 per lesson. Vera's fixed costs for the year total $6 000 1. The contribution margin per unit is: 2. The break-even number of sales units is: 3. The break-even in sales dollars is: 4. The profit was $18 000. How many extra units above breakeven were sold? 5. What would the $profit be if we sold 500 units? 6. How much sales revenue was generated with the sale of 500 lessons? 7. If we prepared the contribution margin income statement, what would the total variable costs be for the sale of 500 lessons? 8. If the fixed costs increased to $8 000 and the variable increased to $30 per lesson, what would be the new contribution margin per unit? 9. The margin of safety: 10. A fixed cost is a cost that