Charm Enterprises' production budget shows the following units to be produced for the coming three months: A finished unit requires four ounces of a key direct material. The March 31 Raw Materials inventory has 2,560 ounces (oz.) of the material. Each month's ending Raw Materials inventory should be 35% of the following month's production needs. The materials to be purchased during May should be: 11,352 oz. 11,520 oz. 7,448 oz. 15,384 oz. 7,616 oz