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 Pixed expenses Net operating income $ 75,000 45,000 30,000 22,800 $ 7,200 3. What is the variable expense ratio? Variable expense ratio 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 $1,650, and unit sales increase by 230 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 units 9. What is the break-even point in dollar sales? Break-even point