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 1500 units): Sales Variable expenses Contribution margin Fixed expenses Net operating income $100,000 65,000 35,000 30, 100 $ 4,900 3. What is the variable expense ratio? Variable expense ratio %