Charm Enterprises' production budget shows the following units to be produced for the coming three months: April May June 3,510 3,830 3,710 Units to be produced A finished unit requires three ounces of a key direct material. The March 31 Raw Materials Inventory has 3,447 ounces (oz.) of the material. Each month's ending Raw Materials Inventory should be 30% of the following month's production needs. The materials to be purchased during May should be