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. materials purchases in may should be?