Collin Ltd assembles calculators which sell for $20 each. The variable costs per calculator total $9 and fixed costs total $220 000 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 $55 000. How many extra units above breakeven were sold? 5. What would the $profit be if we sold 30 000 units? 6. How much sales revenue was generated with the sale of 30 000 units? 7. If we prepared the contribution margin income statement, what would the total variable costs be for the sale of 30 000 calculators? 8. If the fixed costs reduced to $180 000 and the variable costs reduced to $8 per calculator, what would be the new contribution margin per unit? 9. The margin of safety: 10. A fixed cost is a cost that