Able’s basic earnings per share ((Net Income − Preferred Stock Dividends) / weighted average shares outstanding) for 2004 was [($720,000 − ($500 × 6,000 × 0.03) − ($1,000 × 1,000 × 0.08)] / 1,000,000 = $0.55. If the convertible preferred were converted to common stock on January 1, 6,000 × 40 = 240,000 additional shares would have been issued. Also, dividends on the convertible preferred would not have been paid.
So diluted EPS was ($720,000 − 80,000) / (1,000,000 + 240,000) = $0.52.