[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 $ 15,000 9,000 6,000 Fixed expenses 3,120 Net operating income $ 2,880 5. If sales decline to 900 units, what would be the net operating income? Net operating income $ 2,880