Bonita Corporation sells three different models of a mosquito "zapper." Model A$12$ sells for $$57$ and has variable costs of $$44.$ Model

B$22$ sells for $$101$ and has variable costs of $$73.$ Model $C124$ sells for $$403$ and has variable costs of $$304.$ The sales mix of the three

models is A$12,55\%$; B$22,28\%$; and C$124,17\%.$

What is the weighted$-$average unit contribution margin? $($Round answer to $2$ decimal places, e$.$g$.15\mathrm{.}50.)$