Nellie Company has monthly fixed costs totaling $100,000 and variable costs of $20 per unit. Each unit of product is sold for $25. Assume Nellie Company expects to sell 24,000 units of product this coming month.

1. Calculate the contribution margin per unit.
2. Find the break-even point in units.
3. How many units must be sold to earn a monthly profit of $40,000?
4. Calculate the contribution margin ratio.
5. Find the break-even point in sales dollars
6. What amount of sales dollars is required to earn a monthly profit of $60,000?
7. Find the margin of safety in units.
8. Find the margin of safety in sales dollars

Please show work, I'm trying to understand !