Need help with 8-11, thank you!

Required information [The following information applies to the questions displayed below.) Oslo Company prepared the following contribution format income statement based on a sales volume of 1,000 units (the relevant range of production is 500 units to 1,500 units): Sales Variable expenses Contribution margin Fixed expenses Net operating income $ 45,000 31,500 13,500 8,640 $4,860 8. What is the break-even point in unit sales? Break-even point units 9. What is the break-even point in dollar sales? Break-even point 10. How many units must be sold to achieve a target profit of $8,100? Number of units 11. What is the margin of safety in dollars? What is the margin of safety percentage? Margin of safety in dollars Margin of safety percentage %