Archer Industries sells three different sets of sportswear. Sleek sells for $30 and has variable costs of $18; Smooth sells for $50 and has variable costs of $30; Potent sells for $70 and has variable costs of $45. The sales mix of the three sets is: Sleek, 50%; Smooth, 30%; and Potent, 20%.

What is the weighted-average unit contribution margin?