! 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 1,500 units): Sales $ 10,000 Variable expenses 5,500 Contribution margin 4,500 Fixed expenses 2,250 Net operating income $ 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 $ 300