E$16-15($Weighted$-$Average Number of Shares$)$ Gogean Inc. uses a calendar year for financial reporting. The company is authorized to issued $9,000,000$ shares of $$10$ par common stock. At no time has Gogean issued any potentially dilutive securities$.$ Listed below is a summary of Gogean$$s common stock activities.

$1.$ Number of common shares issued and outstanding at December $31,20112,400,000$

$2.$ Shares issued as a result of a $10\%$ stock dividend on September $30,2012240,000$

$3.$ Shares issued for cash on March $31,20132,000,000$

Number of common shares issued and outstanding at December $31,20134,640,000$

$4.$ A $2-$for$-1$ stock split of Gogean$$s common stock place on March $31,2014$

Instructions

$($a$)$ Compute the weight$-$average number of common shares used in computing earnings per common share for $2012$ on the $2013$ comparative income statement.

$($b$)$ Compute the weight$-$average number of common shares used in computing earnings per common share for $2013$ on the $2013$ comparative income statement.

$($c$)$ Compute the weight$-$average number of common shares used in computing earnings per common share for $2013$ on the $2014$ comparative income statement.

$($d$)$ Compute the weight$-$average number of common shares used in computing earnings per common share for $2014$ on the $2014$ comparative income statement.