The specific identification method uses the specific cost of each inventory unit to determine ending inventory and cost of goods sold. Specific identification requires that companies keep records of the original cost of each individual inventory item. In the specific identification method, the company knows exactly which item was sold and exactly what the item cost. The specific identification method is impractical unless each unit can be identified accurately. This costing method is best for businesses that sell unique, easily identified inventory items, such as jeweler (a specific diamond earring), an automobile dealer (each automobile has a unique serial number) and real estate (identified by address). This method requires the business maintains detailed records of inventory sales and purchases as well as carefully identifying the inventory sold.