Oslo Company prepared the following contribution format !! statement based on a sales volume of 1,000 units (the relevant range of production is 500 units to 1,500 units): Sales $ 85, 000 Variable expenses 59, 500 Contribution margin 25, 500 Fixed expenses 20, 400 Net operating income $ 5, 100 Required: 5. If sales decline to 900 units, what would be the net operating income? Note: Round "Per Unit" calculations to 2 decimal places. Net operating income