Blue Spruce Industries sells three different sets of sportswear. Sleek sells for $66 and has unit variable costs of $58; Smooth sells for $86 and has unit variable costs of $46; Potent sells for $96 and has unit variable costs of $76. 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 $