Rock Company produces a variety of pieces of clothing. The following information describes the activity and costs for the pants department. All production workers are paid hourly and move between departments (labor costs are avoidable). 2,000 pairs of pants 2,500 pairs of pants Fabric Direct Labor $ 6,300 $ 10,000 $ 7,875 $ 12,500 Rent on the equipment $ 3,500 $ 3,500 Total Product Costs $ 19,800 $ 23,875 What is the variable cost per pair of pants? A. $8.15 B.$3.15 C. $9.55 D. $9.90