Question 5 2.5 pts Robert Langdon Corp. began the fourth quarter with 500 items of inventory that it had previously purchased for $10 each ($5,000 total cost). During the fourth quarter, Langdon purchased an additional 800 items of inventory $12 each ($9,600 total cost). Later in the fourth quarter, Langdon sold 1,000 items for $20 each, which was the only sale during the quarter. What is Langdon's inventory balance at the end of 2020? Langdon uses the FIFO cost flow assumption. (just enter the number, without any commas or a dollar sign)