Whistle Works manufacturers safety whistle keychains. They have the following information available to prepare their master​ budget:
Units to be produced
October 4,500
November 4,750
December 5,200
Whistle Works sells each whistle for $12. It takes 3 ounces of metal to produce each whistle at a cost of $0.50 per ounce. They prefer to have 10% of materials required for the following​ month's production in ending inventory as well. What is the total cost of direct materials for October to meet production​ needs?
a) $6,525
b) $7,875
c) $8,775
d) $7,125