2. Nellie Company has monthly fixed costs totaling $100,000 and variable costs of $20 per unit. Each unit of product is sold for $25. (5.3) a. Calculate the contribution margin per unit. b. Calculate the contribution margin ratio. c. Find the break-even point in units. d. Find the break-even point in sales dollars. e. How many units must be sold to earn a monthly profit of $40,000? f. What amount of sales dollars is required to earn a monthly profit of $60,000