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 $ 25,400 13,800 11,600 7,772 $ 3,828 Required: If sales declined to 900 units, what would be the net operating income? (Do not round intermediate calculations.) Net operating income