Charm enterprises production budget shows the following units to be produced for the coming three months. Units to be produced April $2,610 May $. 2,930 June $2,810 A finished unit requires three ounces of a key direct material. The March 31 raw materials inventory has 2,637 ounces (oz) of the material. Each months ending Raw materials inventory should be 30% of the following months production needs. Materials purchases in May should be: