Required information [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 $ 30,000 16,500 13,500 7,830 $ 5,670 4. If sales increase to 1,001 units, what would be the increase in net operating income? (Round your answer to 2 decimal places.) Answer is complete but not entirely correct. Increase in net operating i income $ (16,499.55)