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 $ $100,000$

Variable expenses $65,000$

Contribution margin $35,000$

Fixed expenses $30,100$

Net operating income $ $4,900$

$12.$ What is the degree of operating leverage?

Note: Round your answer to $2$ decimal places.