The shareholders equity of Phax Corporation includes $200.000 of $1 par common stock and $400,000 shares of $1 par value of 6% cumulative, nonparticipating preferred stock. The board of directors of Phax declared cash dividends of $50,000 in 2018 after paying $20,000 cash dividends in each of 2020 and 2021. What is the amount of dividends common shareholders receive in 2021