I need formulas to plug into excel. Thank you

Chapter 5: Applying Excel Data Unit sales Selling price per unit Variable expenses per unit Fixed expenses 20,000 units $60 per unit S45 per unit $240,000 Enter a formula into each of the cells marked with a ? below 0 Review Problem: CVP Relationships 2 Compute the CM ratio and variable expense ratic 3 Selling price per unit 4 Variable expenses per unit 5 Contribution margin per unit ?per unit ? per unit per unit 7 CM ratio 8 Variable expense ratio 9 O Compute the break-even 1 Break-even in unit sales 2 Break-even in dollar sales ? units 4 Compute the margin of safety 5 Margin of safety in dollars Margin of safety percentage