Wren Company produces three products with the following characteristics: Planned unit sales Price per unit Variable cost per unit Regular Custom Deluxe 18,000 12,000 10,000 16 20 24 3 6 8 Total fixed costs at Wren Company are $421,500 per year. Which of the following is the required total unit sales of the three products for Wren Company to break even? Select one: a. 34,000 o b. 30,000 o c. 25,000 o d. 31,000