Please answer 6,7,8,9

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 $ 20,000 12,000 8,000 6,000 $ 2,000 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? Net operating income 7. If the variable cost per unit increases by $1. spending on advertising increases by $1,500, and unit sales increase by 250 units, what would be the net operating income? Net operating income 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