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 oxpenses Net operating income $ 20,000 12,000 8,000 6,000 $ 2,000 2. What is the contribution margin ratio? Contribution margin ratio %