Sandhill Inc. uses a calendar year for financial reporting. The company is authorized to issue 8,610,000 shares of $10 par common stock. At no time has Sandhill issued any potentially dilutive securities. Listed below is a summary of Sandhills common stock activities.

1.		Number of common shares issued and outstanding at December 31, 2018		1,920,000
2.		Shares issued as a result of a 10% stock dividend on September 30, 2019		192,000
3.		Shares issued for cash on March 31, 2020		2,060,000
		Number of common shares issued and outstanding at December 31, 2020		4,172,000
4.		A 2-for-1 stock split of Sandhills common stock took place on March 31, 2021

Compute the weighted-average number of common shares used in computing earnings per common share for 2020 on the 2020 comparative income statement.