please help me with how to do this?

Oriole Corporation sells three different models of mosquito "zapper." Model A12 sells for $65 and has variable costs of $55. Model B22 sells for $150 and has variable costs of $110. Model C124 sells for $425 and has variable costs of $325. The sales mix of the thred models is as follows: A12, 55%;822,25%; and C124, 20%. (a) What is the weighted-average unit contribution margin? (Round answer to 2 decimal places, e.s. 15.25.)