Exercise 16-15 Vaughn Inc. uses a calendar year for financlal reporting. The company is authorlized to issue 8,320,000 shares of $12 par common stock. At no time has Vaughn issued any potentially dilutive securities. Lsted below is a summary of Vaughn's common stock activities common shares issued and outstanding at December 31, 2015 1 Number 2,140,000 shares issued as a result of a 12% stock dividend on September 30, 2016 2 256,800 Shares issued for cash on March 31, 2017 2,030,000 4,426,800 Number of common shares issued and outstanding at December 31, 2017 March 31, 2018 4 A 2-for-1 stock split of Vaughn's common stock took place c Compute weight averace number of common shares use computing earnings per common sha for 2016 on the 2017 comparative income statement. shares LINK TO TEXT Compute the weighted-average number of common shares used in computing earnings per common share for 2017 on the 2017 comparative income statement. shares LINK TO TEXT Compute the weighted-average number of common shares to be used in computing earnings per common share for 2017 on the 2018 comparative income statement. shares LTNK TO TEXT Compute the weighted-average number of common shares to bee used in computing earnings per common share for 2018 on the 2018 comparative income statement. shares