According to IAS 33, the numerator for Basic EPS is the profit or loss attributable to ordinary equity holders of the parent entity (Profit After Tax). The problem states profit was $1,100,000 after tax; no adjustments for preference dividends are required.

The denominator is the weighted average number of ordinary shares (WANS) outstanding during the period. Shares issued for cash are included from the date consideration is receivable.

• Opening shares: $10,000,000 \times \frac{12}{12} = 10,000,000$
• Shares issued Apr 1: $3,000,000 \times \frac{9}{12} = 2,250,000$
• Total WANS: $10,000,000 + 2,250,000 = 12,250,000$.

IFRS Foundation. International Accounting Standard 33 (IAS 33): Earnings per Share. Paragraph 10. (Defines the numerator as profit/loss attributable to ordinary equity holders).

IFRS Foundation. International Accounting Standard 33 (IAS 33): Earnings per Share. Paragraphs 19–21. (Defines the weighted average number of shares calculation and time-weighting for shares issued for cash).

Kieso, D. E., Weygandt, J. J., & Warfield, T. D. (2020). Intermediate Accounting (17th ed.). Wiley. Chapter 16: Dilutive Securities and Earnings Per Share, Section "Basic Earnings Per Share". (Provides academic verification of the standard WANS formula).