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): 8. What is the break-even point in unit sales? (Round intermediate calculations to 2 decimal places.) 3. What is the variable expense ratio? 2. What is the contribution margin ratio? 4. If sales increase to 1,001 units, what would be the increase in net operating income? (Round your answer to 2 decimal places.) 7. If the variable cost per unit increases by $1, spending on advertising increases by $1,250, and unit sales increase by 150 units, what would be the net operating income? (Round "Per Unit" calculations to 2 decimal places.) Required: 1. What is the contribution margin per unit? (Round your answer to 2 decimal places.) 5. If sales decline to 900 units, what would be the net operating income? (Round "Per Unit" calculations to 2 decimal places.)