! 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 Operating income $ 23,900 13,300 10,600 7,632 $ 2,968 4. If sales increase to 1,001 units, what would be the increase in operating income? (Round your answer to 2 decimal places.) Increase in operating income