How to solve question 18? With specific steps

Wren Company produces three products with the following characteristics: Regular Custom Deluxe 13,000 10,000 8,000 $13.00 $18.00 $21.00 Variable Cost per unit $6.00 $9.00 $15.00 Planned Unit Sales Price per unit Total fixed costs at Wren Company are $200,000 per year. 17. (Maximum Grade:4.0 points - Suggested Time: 4.0 minutes) Which of the following is closest to the required total unit sales of the three products for Wren Company to break even? a. 11,992 b. 21,528 c. 27,074 d. 31,000 18. (Maximum Grade: 5.0 points-Suggested Time: 5.0 points) If wren Company faces a tax rate of 30% and has a target after tax income of $50,000 which of the following is the closest to required unit sales? a. Regular -4,055; Custom 3,119; Deluxe -2,495 b. Regular 12,338; Custom 12,338; Deluxe- 12,338 c. Regular -15,409: Custom -11,853; Deluxe-9,482 d. Regular 20,815; Custom-16,012; Deluxe 12,809