Brief Exercise 6-3 On January 3, Piano Corp. purchased 3 portable electronic keyboards for $600 each. On January 20, it purchased 2 more of the same model keyboards for $475 each. During the month, it sold 2 keyboards; 1 was purchased on January 3 and the other was purchased on January 20. Calculate the cost of goods sold and ending inventory for the month using specific identification. Cost of goods sold Ending inventory