The Water Bottle Manufacturing Company has three employees who work in the warehouse. The workers complete a purchase order and mail it to the supplier of their choice. The inventory is delivered directly to the warehouse. All warehouse workers are authorised to order merchandise when it falls below the reorder level. The workers send a memo to accounts payable informing them about the inventory receipt. Accounts payable compares the warehouse memo to the supplier's invoice. Accounts payable prepares a check that the treasurer signs. Required: (a) Advice Water Bottle Manufacturing Company about improving its internal controls. (5 Marks)