Cost Accounting focuses on determining, recording, and controlling costs of production to improve efficiency and profitability.
Step 1: Analyze the options.
- Financial transactions — Financial Accounting
- Determination and control of costs — Correct ✔
- Preparation of final accounts — Financial Accounting
- Profit calculation only — Too limited Step 2: Conclusion.
Thus option (B) is correct. Final Answer:
\[
\boxed{(B)}
\]