Please help, my calculations are incorrect and I'm not sure why. Show work and provide solutions for the following problems based on the provided required information. I will rate accordingly.

1. If the selling price increases by $2 per unit and the sales volume decreases by 100 units, what would be the net operating income?

2. If the variable cost per unit increases by $1, spending on advertising increases by $1,800, and unit sales increase by 260 units, what would be the net operating income?

3. What is the break-even point in unit sales?

4. What is the break-even point in dollar sales?

5. How many units must be sold to achieve a target profit of $24,300?

6. What is the margin of safety in dollars? What is the margin of safety percentage?

7. What is the degree of operating leverage? (Round your answer to 2 decimal places.)

8. Using the degree of operating leverage, what is the estimated percent increase in net operating income of a 5% increase in sales? (Round your intermediate calculations and final answer to 2 decimal places.)

9. Assume that the amounts of the companys total variable expenses and total fixed expenses were reversed. In other words, assume that the total variable expenses are $33,210 and the total fixed expenses are $49,500. Under this scenario and assuming that total sales remain the same, what is the degree of operating leverage? (Round your answer to 2 decimal places.)

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 $ 90,000 49,500 40, 500 33,210 $ 7,290