The Foundational 15 (L06-1, L06-3, LO6-4, LO6-5, L06-6, LO6-7, LO6-8) (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 $ 20,000 12,000 8,000 6,000 $ 2,000 Required: 1. What is the contribution margin per unit? Contribution margin per unit 2. What is the contribution margin ratio? Contribution margin ratio % 3. What is the variable expense ratio? Variable expense ratio % nces Foundational 6-4 4.If sales increase to 1,001 units, what would be the increase in net operating income? Increase in net operating income