Kennedy Co. sells two products, Arks and Bins. Last year, Kennedy sold 32,000 units of Arks and 18,000 units of Bins. Related data are: Product Unit Selling Price Unit Variable Cost Unit Contribution Margin Arks $ 80 $20 $60 Bins 120 40 80 What was Kennedy's overall product's unit contribution margin? a. $70.00 b. $72.00 c. $100.00 d. $67.20