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 1500 units) Sales $ 80,000 Variable expenses 52,000 Contribution margin 28,000 Fixed expenses 21,840 Net operating Income $ 6,160 5. If sales decline to 900 units, what would be the net operating income? Net operating income