Ivanhoe Corporation sells three different models of a mosquito "zapper." Model A12 sells for $54 and has unit variable costs of $38. Model B22 sells for $108 and has unit variable costs of $76. Model C124 sells for $432 and has unit variable costs of $324. 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, es. 15,50.) Weighted-Average Unit Contribution Margin