On June 30, 2020, Pier1 Inc. issued 500 shares of $1 common stock for $15 per share. On June 30, 2020, Pier5 Inc. reacquired 100 shares of common stock at $12 per share and immediately retired the shares. On December 15, 2020, Pier5 Inc. reacquired 200 shares of common stock at $19 per share and immediately retired the shares. By what amount did retained earnings decrease as a result of the reacquisition of common stock on December 15, 2020