Charm Enterprises' production budget shows the following units to be produced for the coming three months:

April May June Units to be produced

3,5603,880 3,760

A finished unit requires four ounces of a key direct material. The March 31 Raw Materials Inventory has 5,432 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:

• 10,256 oz.
• 15,520 oz.
• 10,088 oz.
• 15,352 oz.
• 20,784 oz.