please help me solve this and explain step by step filling the yellow highlighted area. thankyou!

Given the following information complete a CVR analysis for JPL, Inc.: Unit sales 11,200 units Selling price per unit $75 per unit Variable expenses per unit $45 per unit Fixed expenses $210,000 Use the data to answer the following. 1. Compute the CM ratio and variable expense ratio Selling price per unit per unit Variable expenses per unit per unit Contribution margin per unit per unit CM ratio Variable expense ratio 2. Compute the break-even point Break-even in unit sales units Break-even in dollar sales 3. Compute the margin of safety Margin of safety in dollars Margin of safety percentage 4. Compute the degree of operating leverage Sales Variable expenses Contribution margin Fixed expenses Net operating income