Required information [The following information applies to the questions displayed below.) $ Income Statement Sales (1,000 units) Variable expenses Contribution margin Fixed expenses Net operating income 100,000 65,000 35,000 30,100 4,900 4. Assuming the increase is within the relevant range, if sales increase to 1,001 units, what is the increase in net operating income? (Round your answer to 2 decimal places.) Increase in net operating income