ABC sells three types of ice cream: Vanilla, Caramels, and Chocolate. It sold 11,000 units last year. Chocolate outsold Vanilla by a margin of 2 to 1. Sales of Caramels were the same as sales of Chocolate. Fixed costs for ABC are $15,000. Additional information follows: Product Vanilla Unit Sales Prices Unit Variable Cost $6.00 $4.00 $7.00 $6.00 Caramels Chocolate $9.00 $2.00 The weighted average contribution margin for ABC is... Select one: a. $3.60 b. $2.80 c. $0.40 d. $3.20