Which of the following is true? O Materials requisition slips indicate the receipt of materials from a supplier. O In a job-order cost system, each entry to the Raw Material Inventory account should be accompanied by a posting to one or more job cost sheets. O When direct materials are requisitioned from the storeroom, the cost of the materials should be removed from the Work in Process Inventory account and added to the job cost sheets for the individual jobs on which the material was used. O Upon purchase of raw materials there is no attempt to associate the cost of materials with specific jobs or orders.