Production workers prepare materials requisition forms (four copies) and forward them to the production supervisor for approval. The materials requisition form is then forwarded to stores. In stores, the order is filled, and the materials requisition form is signed by a clerk. The clerk then returns Copy 1 of the materials requisition form along with the materials to the production workers. Copy 2 of the materials requisition form is forwarded to the production supervisor. Copy 4 is forwarded to the cost accounting department. Copy 3 of the materials requisition form is used in stores to manually post the materials that were issued to the perpetual inventory records. Copy 3 is then filed in stores by number.