The accounting records of Kingbird, Inc. show the following data. Beginning inventory Purchases Sales 2,980 units at $5 7,890 units at $7 9,140 units at $10 (a) Determine cost of goods sold during the period under a periodic inventory system using the FIFO method. (Round answer to 0 decimal places, e.g. 1,250.) FIFO Cost of goods sold during the period $