The records of Smaller Company reflected the following for the month of February Date Transaction Number of Units Unit Costs Beginning Inventory 600 Purchase No. 1 500 Sale No. 1 Purchase No. 2 Sale No. 2 2/23 Purchase No. 3 $10 2/28 Ending Inventory Determine the amount of ending inventory and cost of goods sold using the following methods and systems: Method System Inventory Cost of Goods Sold a) LIFO Periodic b) LIFO Perpetual c) FIFO Periodic d) FIFO Perpetual e) AVERAGE Periodic f) AVERAGE Perpetual