Cullumber Corporation sells three different models of a mosquito "zapper." Model A12 sells for $53 and has unit variable costs of $37. Model B22 sells for $106 and has unit variable costs of $74. Model C124 sells for $424 and has unit variable costs of $318. The sales mix(as a percentage of total units) of the three models is A12, 60%; B22, 15%; and C124, 25%. What is the weighted average unit contribution margin? (Round answer to 2 decimal places, e.g. 15.50.) "Weighted Average Unit Contribution Margin