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 $ 24,200 Variable expenses 13,400 Contribution margin 10,800 Fixed expenses 7,668 Operating income $ 3,132 2. What is the contribution margin ratio? (Round your percentage answer to 2 decimal places (i.e .1234 should be entered as 12.34))