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$)$:

$2.$ What is the contribution margin ratio?

$3.$ What is the variable expense ratio?

$4.$ If sales increase to $1,001$ units, what would be the increase in net operating income?

$5.$ If sales decline to $900$ units, what would be the net operating income?

$6.$ If the selling price increases by $\backslash (\backslash$$ $2\backslash )$ per unit and the sales volume decreases by $100$ units, what would be the net operating income?

$7.$ If the variable cost per unit increases by $\backslash (\backslash$$ $1\backslash ),$ spending on advertising increases by $\backslash (\backslash$$ $1,250\backslash ),$ and unit sales increase by $150$ units, what would be the net operating income?

$8.$ What is the break$-$even poiht in unit sales?

$9.$ What is the break$-$even point in dollar sales?

$10.$ How many units must be sold to achieve a target profit of $\backslash (\backslash$$ $8,400\backslash )?$

$11.$ What is the margin of safety in dollars? What is the margin of safety percentage?

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

$13.$ Using the degree of operating leverage, what is the estimated percent increase in net operating income that would result from a $\backslash (5\backslash \%\backslash )$ increase in unit sales?

$14.$ Assume the amounts of the company's total variable expenses and total fixed expenses were reversed. In other words, assume the total variable expenses are $\backslash (\backslash$$ $8,400\backslash )$ and the total fixed expenses are $\backslash (\backslash$$ $21,000\backslash ).$ Under this scenario and assuming total sales remain the same, what is the degree of operating leverage?

$15.$ Assume the amounts of the company's total variable expenses and total fixed expenses were reversed. In other words, assume the total variable expenses are $\backslash (\backslash$$ $8,400\backslash )$ and the total fixed expenses are $\backslash (\backslash$$ $21,000\backslash ).$ Using the degree of operating leverage, what is the estimated percent increase in net operating income that would result from a $\backslash (5\backslash \%\backslash )$ increase in unit sales?