Zest Soda, a local convenience store, sells soft drinks. It sells two large drinks for every small drink. A large drink sells for $1.70 with a variable cost of $0.40. A small drink sells for $1.10 with a variable cost of $0.30. What is the weighted average contribution margin? (Round your intermediate calculations and final answer to two decimal places.)

A. $1.70 per drink

B. $3.40 per drink

C. $1.13 per drink

D. $0.40 per drink