Under the provisions of AASB 133, basic earnings per share is calculated as: Select one: O profit or loss before income tax expense - weighted average number of ordinary shares outstanding during the reporting period profit or loss excluding extraordinary items and before income tax expense - weighted average number of ordinary shares outstanding during the reporting period profit or loss (after tax) from continuing operations attributable to ordinary equity holders of the parent = weighted average number of ordinary shares outstanding during the reporting period profit or loss including extraordinary items but before income tax expense - weighted average number of ordinary shares outstanding during the reporting period