QUESTIONS$\mathrm{.}1)$ 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 decrease to $900$ units, what would be the net operating income?$6)$ If the selling price increases by $$2$ per unit and the sales volume decreases by $100$ units, what would be the net operating income?$7)$ the variable cost per unit increases by $$1,$ spending on advertising increases by $$1,300,$ and unit sales increase by $160$ units, what would be the net operating income?$8)$ what is the break even point in unit sales?$9)$ what is the break even point in dollar sales?$10)$ How many units must be sold to achieve a target profit of $$8,400?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?$14)$ a: What is the overall contribution margin $($CM$)$ ratio for the company?b:What is the company's overall break$-$even point in dollar sales?c:Prepare a contribution format income statement at the company's break$-$even point that shows the appropriate levels of sales for the two products.ROUND THE ANSWERS OF QUESTION $1$ to $13$ to $2$ decimal places.PLEASE USE THE DETAILS IN THE PHOTO BELOW TO ANSWER ALL THE QUESTIONS. PLEASE ANSWER ALL QUESTIONS