单选题 The year-end financial statements for a firm using last in first out (LIFO) acounting show an inventory level of $5000, cost of goods sold (COGS) of $16000, and inventory purchases of $14500. If the LIFO reserve is $ 4000 at year-end and was $1500 at the beginning of the year, what would the COGS have been using FIFO accounting?