Final answer:
The number of shares to be used in computing basic earnings per share is 4,680,000. The number of shares to be used in computing diluted earnings per share is 5,080,000.
Step-by-step explanation:
To determine the number of shares to be used in computing basic earnings per share and diluted earnings per share, we need to consider the various share issuances and conversions during the year.
- Shares outstanding on December 31, 2010: 4,000,000
- Additional shares issued on April 1, 2011: 200,000
- Additional shares issued on September 1, 2011: 480,000
- Convertible bonds issued on October 1, 2011: $6,000,000 (each convertible into 40 shares)
To compute basic earnings per share, we only consider the shares outstanding on December 31, 2011, without accounting for any potential conversions:
Total shares on December 31, 2011: 4,000,000 + 200,000 + 480,000 = 4,680,000
Therefore, the number of shares to be used in computing basic earnings per share is 4,680,000.
To compute diluted earnings per share, we need to consider the potential conversion of the convertible bonds:
Total shares if all bonds were converted: 4,680,000 + (6,000,000 / 1,000) * 40 = 5,080,000
Therefore, the number of shares to be used in computing diluted earnings per share is 5,080,000.