Analyze the performance of different payment methods.

Focus on helping a business owner decide which payment methods to keep, promote, or reconsider.

Steps:
1. Compare transaction volume and net revenue across payment methods.
2. Compare success rates and failure rates for each payment method.
3. Analyze refund rates and refunded amounts by payment method.
4. Identify which payment methods contribute the most to net revenue.
5. Highlight any payment methods that show high friction (low success or high refunds).

Output:
- Clear comparisons between payment methods
- Minimal charts that support decision-making
- A short conclusion answering: “Which payment methods help or hurt my business?