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 Unit Sales Unit Variable Prices Cost $6.00 $4.00 Vanilla Caramels Chocolate $7.00 $6.00 $9.00 $2.00 The weighted average contribution margin for ABC is... Select one: O a. $2.80 O b. $0.40 O c. $3.60 O d. $3.20