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 1,590 units): Sales Variable expenses Contribution margin Fixed expenses Net operating income $45,600 31,560 13,560 8,640 $4,860 Foundational 5-3 (Algo) 3.

What is the variable expense ratio? Variable expense ratio %