Russell Corporation sells three different models of mosquito "zapper Model A12 sells for $55 and has variable costs of $50. Model B22 sells for $135 and has variable costs of $95. Model C124 sells for $460 and has variable costs of 5365. The sales mix of the three models is as follows: A12,50%; B22. 15%: and C124, 35%. (a) What is the weighted average unit contribution margin? (Round answer to 2 decimal places, es 15.25 $ Weighted average unit contribution margin