Oslo Company prepared the following contribution format income statement based on a sales volume of 1000 units (the relevant range of production is 500 units to 1,500 units) Sales Variable expenses Contribution margin Fixed expenses Net operating income $ 20,000 12,000 8,000 6,000 $ 2,000 7. If the variable cost per unit increases by $1. spending on advertising increases by $1,500, and unit sales increase by 250 units, what would be the net operating income