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 $ 65, 000 Variable expenses 45 , 500 Contribution margin 19, 500 Fixed expenses 14, 040 Net operating income $ 5,460 5. If sales decline to 900 units, what would be the net operating income? Net operating income