Flounder Inc. uses a calendar year for financial reporting. The company is authorized to issue 9,680,000 shares of $10 par common stock. At no time has Flounder issued any potentially dilutive securities. Listed below is a summary of Flounders common stock activities.

1.		Number of common shares issued and outstanding at December 31, 2018		2,000,000
2.		Shares issued as a result of a 10% stock dividend on September 30, 2019		200,000
3.		Shares issued for cash on March 31, 2020		1,940,000
		Number of common shares issued and outstanding at December 31, 2020		4,140,000
4.		A 2-for-1 stock split of Flounders common stock took place on March 31, 2021

1. Compute the weighted-average number of common shares used in computing earnings per common share for 2019 on the 2020 comparative income statement.

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

3. Compute the weighted-average number of common shares to be used in computing earnings per common share for 2020 on the 2021 comparative income statement.

4. Compute the weighted-average number of common shares to be used in computing earnings per common share for 2021 on the 2021 comparative income statement.