The following partial information is taken from the comparative balance sheet of Levi Corporation: 1 12/31/2021 12/31/2020 Shareholders' equity Common stock, $5 par; 33 million shares authorized; 28 million shares issued and 23 million shares outstanding at 12/31/2021; and million shares issued and shares outstanding at 12/31/2020. Additional paid-in capital on common stock Retained earnings Treasury common stock, at cost, 5 million shares at 12/31/2021 and 3 million shares at 12/31/2020 Total shareholders' equity $140 million 520 million 195 million $115 million 392 million 157 million (70 million) $785 million (48 million) $616 million How many of Levi's common shares were outstanding on 12/31/2020