Athlead Stadium typically sells 90% regular seats and 10% box seats. The unit contribution margin is $6 for a regular seat and $10 for a box seat. Total fixed costs are $64,000. How many regular seats and how many box seats does the stadium have to sell to break-even? 9,000 regular seats and 1,000 box seats 3,600 regular seats and 400 box seats 9,600 regular seats and 640 box seats 14,400 regular seats and 1,600 box seats