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 23,600 13, 20e 10,400 7,592 2,888 $ Required: If sales declined to 900 units, what would be the net operating income? (Do not round intermediate calculations.) Not operating income