Answer the following questions using the information below: Company sells a single product. 500 units were sold resulting in $20,000 of sales revenue, $8.000 of variable costs, and $2.400 of fixed costs. 1. Total Contribution Margin equals: A) $13,000 B) $12,000 C) $4,800 (2 points) D) None of these answers are correct. Show your work