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 1000 units (the relevant range of production is 500 units to 1,500 units): $ 10,000 5.500 Sales Variable expenses Contribution margin Fixed expenses Net operating income 4,500 2.250 7. If the variable cost per unit increases by $1, spending on advertising increases by $1.000, and unit sales increase by 100 units, what would be the net operating income? Net operating income