Please help me with these questions

1. What is the contribution margin per unit?

2. What is the contribution margin ratio?

3. What is the variable expense ratio?

8. What is the break-even point in unit sales?

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?

Required information The Foundational 15 (Algo) [LO5-1, LO5-2, LO5-3, LO5-4, LO5-5, LO5-6, LO5-7] [The following information applies to the questions displayed below.] 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): Foundational 5-1 (Algo)