The Foundational $15($Static$)[$LO$5-1,$ LO$5-2,$ LO$5-3,$ LO$5-4,$ LO$5-5,$ LO$5-6,$ LO$5-7]$

$[$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$)$:

Foundational $5-13($Static$)$

Using the degree of operating leverage, what is the estimated percent increase in net operating income that would result from a

$5\%$ increase in unit sales?