Charm Enterprises production budget shows the following units to be produced for the coming three months: April May June Units to be produced 2,560 2,880 2,760 A finished unit requires four ounces of a key direct material. The March 31 Raw Materials Inventory has 4,032 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: