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 $ 85,000 59,500 25,500 20,400 Net operating income $5,100 Fixed expenses Required: 4. If sales increase to 1,001 units, what would be the increase in net operating income? Note: Round your answer to 2 decimal places. Increase in net operating income 4