Any help would be appreciated

Geneva Bottled Water Co. is assembling a weighted average contribution margin chart to better analyze differences between sales on 36oz. and the 20oz. bottled water. The sales price per unit of the 36 oz. bottled water is $3.00 while the sales price per unit of the 20 oz. bottled water is $1.90. The contribution margin per unit for the 36 oz. bottle is $1.96 and the contribution margin of the 20 oz. bottle is $0.18. The 20oz. bottle outsells the 36 oz. bottle by a 4:1 relationship. What is the weighted average contribution margin per unit on these two products? (Round the final answer to the nearest cent.) A. $1.60 B. $0.54 C. $2.68 D. $2.01