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 Fixed expenses Net operating income $ 45,000 31,500 13,500 8,640 $4,860 2. What is the contribution margin ratio? Contribution margin ratio % 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 Fixed expenses Net operating income $ 45,000 31,500 13,500 8,640 $ 4,860 3. What is the variable expense ratio? Variable expense ratio % 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 Fixed expenses Net operating income $ 45,000 31,500 13,500 8,640 $ 4,860 4. If sales increase to 1,001 units, what would be the increase in net operating income? (Round your answer to 2 decimal places.) Increase in net operating income