Brief Exercise 20-7 Markowis Corporation sells three different models of mosquito zapper.? Model A12 sells for $59 and has variable costs of $39. Model B22 sells for $105 and has variable costs of $73. Model C124 sells for $409 and has variable costs of $310. The sales mix of the three models is: A12, 55%; B22, 30%; and C124, 15%. What is the weighted-average unit contribution margin? (Round answer to 2 decimal places, e.g. 15.50.) Weighted-Average Unit Contribution Margin $ Click f you would like to Show Work for this question: Open Show Work