Each Speaker System Requires 3 Boxes and 15 Yards of Wire

Each speaker system requires 3 boxes and 15 yards of wire. Boxes cost $4 each and wire is $0.60 per yard. Connor wants to have 20% of the following month's production needs in ending raw materials inventory. On January 1, Connor had 24,000 boxes and 100,000 yards of wire in inventory.
-Refer to Figure 9-11. What is total selling expense?

A) $65,000
B) $44,000
C) $84,000
D) $109,000
E) $39,000