The following could be seen in the company's annual accounts at the end of 2019:

Cash: $ 8,800. Accounts payable: $ 2,500 Common stock:? Retained earnings on 1 January: $ 5,400. Revenue: $ 19,000. Expenses: $ 14,500. Accounts receivable: $ 3,000. Inventories: $ 16,000

Based on the above information, what was the position of common stock at the end of 2019?

$ 900

$ 19,900

$ 15,400

$ 20,800