Whistle Works manufacturers safety whistle keychains. They have the following information available to prepare their master budget: Units to be produced October November December 4,500 5,550 5,620 Whistle Works sells each whistle for $9. It takes 1 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. How many ounces of direct materials does Whistle Works need to purchase in October to meet production needs? A. 4,500 ounces B. 4,395 ounces C. 5,725 ounces D. 4,605 ounces