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 $ $70,000$

Variable expenses $38,500$

Contribution margin $31,500$

Fixed expenses $23,310$

Net operating income $ $8,190$

$1.$ What is the contribution margin per unit?

$2.$ 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 $$2$ 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 $$1,$ spending on advertising increases by $$1,600,$ and unit sales increase by $220$ units, what would be the net operating income?

$8.$ What is the break$-$even point 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 $$18,900?$

$11.$ 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 $5\%$ increase in unit sales?

$14.$ Assume that the amounts of the company$$s total variable expenses and total fixed expenses were reversed. In other words, assume that the total variable expenses are $$23,310$ and the total fixed expenses are $$38,500.$ Under this scenario and assuming that total sales remain the same, what is the degree of operating leverage?

$15.$ Assume that the amounts of the company$$s total variable expenses and total fixed expenses were reversed. In other words, assume that the total variable expenses are $$23,310$ and the total fixed expenses are $$38,500.$ Using the degree of operating leverage, what is the estimated percent increase in net operating income of a $5\%$ increase in unit sales?