How do you find out if you have been overcharged?

To determine if you've been overcharged, first review your receipts or bills against the prices listed in the store or service provider's pricing information. Compare the total amount charged with what you expected based on your understanding of the rates or previous transactions. If there's a discrepancy, contact the merchant or service provider with your evidence to resolve the issue. Additionally, checking online reviews or consumer forums may provide insights into common pricing practices for similar services or products.