Cullumber Corporation sells three different models of a mosquito "zapper." Model A12 sells for $42 and has unit variable costs of $29. Model B22 sells for $84 and has unit variable costs of $59, Model C124 sells for $336 and has unit variable costs of $252. 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, eg. 15.50) Weighted Average Unit Contribution Margin