The Holiday Card Company, a producer of specialty cards, has asked you to complete several calculations based upon the following information: Income tax rate 30% Selling price per unit $6.60 Variable cost per unit $5.28 Total fixed costs $46,200.00 Required: a. What is the breakeven point in cards? b. What sales volume is needed to earn an after-tax net income of $10,000? c. What sales volume is needed to earn an after-tax net income of $20,000?