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): 6. If the selling price increases by $2 per unit and the sales volume decreases by 100 units, what would be the net operating income? (Round "Per Unit" calculations to 2 decimal places.) 7. If the variable cost per unit increases by $1, spending on advertising increases by $1,450, and unit sales increase by 190 units, what would be the net operating income? (Round "Per Unit" calculations to 2 decimal places.) 8. What is the break-even point in unit sales? (Round intermediate calculations to 2 decimal places.) 9. What is the break-even point in dollar sales? 10. How many units must be sold to achieve a target profit of $13,200 ? (Round intermediate calculations to 2 decimal places.) 11. What is the margin of safety in dollars? What is the margin of safety percentage