$[$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 $ $90,000$

Variable expenses $49,500$

Contribution margin $40,500$

Fixed expenses $33,210$

Net operating income $ $7,290$

$7.$ If the variable cost per unit increases by $$1,$ spending on advertising increases by $$1,800,$ and unit sales increase by $260$ units, what would be the net operating income? $($Round "Per Unit" calculations to $2$ decimal places.$)$