Paolucci Corporation's relevant range of activity is 4,200 units to 10,000 units. When it produces and sells 7,100 units, its average costs per unit are as follows: Direct materials Direct labor Variable manufacturing overhead Fixed manufacturing overhead Fixed selling expense Fixed administrative expense Sales commissions Variable administrative expense Average Cost per Unit $6.40 $3.30 $1.30 $3.70 $1.25 $0.80 $1.20 $0.70 If 6,100 units are sold, the variable cost per unit sold is closest to