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 $ 100,000 Variable expenses 65,000 Contribution margin 35,000 Fixed expenses 30,100 Net operating income $ 4,900 If the variable cost per unit increases by $1, spending on advertising increases by $1,900, and unit sales increase by 280 units, what would be the net operating income? Note: Round "Per Unit" calculations to 2 decimal places.