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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): Required: 1. What is the contribution margin per unit? (Round your answer to 2 decimal places.) 2. What is the contribution margin ratio? (Round your percentage answer to 2 decir 12.34)) 3. What is the variable expense ratio? (Round your percentage answe) 13. Using the degree of operating leverage, what is the estimated percent increase in operating income of a 3% increase in sales? Do not round intermediate calculations. Round your percentage answer to 2 decimal places (i,e 1234 should be entered as 12.34). 11-b. What is the margin of safety percentage? (Round your final answer to the as 12).) 9. What is the break-even point in dollar sales? (Round intermediate calculations nearest dollar amount.) 7. If the variable cost per unit increases by $0.70, spending on advertising increases by $1,200, and unit sales increase by 250 units, what would be the operating income? (Do not round intermediate calculations.) 10. How many units must be sold to achieve a target profit of $5,616 ? (Do not round intern 8. What is the break-even point in unit sales? (Do not round intermediate ca