Pharoah Corporation sells three different models of mosquito "zapper. Model A12 sells for $55 and has variable costs of $50. Model B22 sells for $135 and has variable costs of $95. Model C124 sells for $460 and has variable costs of $365. The sales mix of the three models is as follows: A12, 50%; B22, 15%; and 124, 35%. What is the weighted-average unit contribution margin