Current Attempt in Progress

Sheffield Industries sells three different sets of sportswear. Sleek sells for $$50$ and has unit variable costs of $$38$; Smooth sells for $$70$ and has unit variable costs of $$50$; Potent sells for $$80$ and has unit variable costs of $$60.$ The sales mix of the three sets is: Sleek, $50\%$; Smooth, $30\%$; and Potent, $20\%.$

What is the weighted$-$average unit contribution margin?

Weighted$-$average unit contribution margin $