Kesterson Corporation has provided the following information: Cost Cost per per Period Unit Direct labor Direct materials Variable manufacturing overhead $6.20 $3.10 $1.35 Fixed manufacturing overhead $14,000 Sales commissions $1.50 Variable administrative expense $0.40 Fixed selling and administrative expense $ 4,500 If the selling price is $21.90 per unit, the contribution margin per unit sold is closest to: Multiple Choice $9.35