Samuel Nathan Corporation has provided the following contribution format income statement:

Required:

$($a$)$ What is the contribution margin per unit?

$($b$)$ What is the contribution margin ratio?

$($c$)$ What is the variable expense ratio?

$($d$)$ If sales increase to $8,050$ units, what would be the estimated increase in net operating

income?

$($c$)$ If sales decline to $7,900$ units, what would be the estimated net operating income?

$(9)$ If the selling price increases by $$4$ per unit and the sales volume decreases by $200$ units, what

would be the estimated net operating income?

$($g$)$ If the variable cost per unit increases by $$5,$ advertising increases by $$3,000$ and unit sales

increase by $450$ units, what would be the estimated net operating income?

$($h$)$ What is the break$-$even point in unit sales?

$($i$)$ What is the break$-$even point in sales dollars?

$(0)$ How many units must be sold to achieve a target profit of $$54,500?$

$($k$)$ What is the margin of safety in dollars?

$($l$)$ What is the margin of safety percentage?

$(m)$ What is the degree of operating leverage?

$($n$)$ Using the degree of operating leverage, what is the estimated percent increase in net

operating income of a $15\%$ increase in sales volume?