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? Group of answer choices

a.9,600 regular seats and 640 box seats

b.14,400 regular seats and 1,600 box seats

c.3,600 regular seats and 400 box seats

d.9,000 regular seats and 1,000 box seats