Waterway Inc. uses a calendar year for financial reporting. The company is authorized to issue 8,210,000 shares of $12 par common stock. At no time has Waterway issued any potentially dilutive securities. Listed below is a summary of Waterway's common stock activities. (a) Compute the weighted-average number of common shares used in computing earnings per common share for 2019 on the 2020 comparative income statement. shares