Contribution Margin Ratio, Variable Cost Ratio, Break$-$Even Sales Revenue

The controller of Jeong Company prepared the following projected income statement:

Required:

Calculate the contribution margin ratio. Note: Enter as a percent, rounded to the nearest whole number.

$\%$

Calculate the variable cost ratio. Note: Enter as a percent, rounded to the nearest whole number.

$\%$

Calculate the break$-$even sales revenue for Jeong. Note: Round your answer to the nearest dollar.

$

How could Jeong increase projected operating income without increasing the total sales revenue?

Decrease variable cost and$/$or fixed cost

Decrease the contribution margin ratio

Add more people to the sales force

None of the above

PLEASE REPLY WITH CLEAR ANSWERS FOR EACH. THANK YOU!