Perteet Corporation's relevant range of activity is 3,300 units to 7,500 units. When it produces and sells 5,400 units, its average costs per unit are as follows: Average Cost per Unit Direct materials $ 6.20 Direct labor $ 3.15 Variable manufacturing overhead $ 1.30 Fixed manufacturing overhead $ 3.10 Fixed selling expense $ 0.60 Fixed administrative expense $ 0.30 Sales commissions $ 0.40 Variable administrative expense $ 0.45 If 4,200 units are produced, the total amount of manufacturing overhead cost is closest to: Multiple Choice $18,480 $29,970 $22,200 $15,540