Crane Corporation sells three different models of mosquito "zapper." Model A12 sells for $60 and has variable costs of $45. Model B22 sells for $110 and has variable costs of $85. Model C124 sells for $400 and has variable costs of $295. The sales mix of the three models is as follows: A12, 55%; B22, 20%; and C124, 25%. (a) Your answer is incorrect. What is the weighted-average unit contribution margin? (Round answer to 2 decimal places, e.g. 15.25.) Weighted-average unit contribution margin $