I felt the regulation text itself was clear that the first request is free.
"1 - The controller shall provide a copy of the personal data undergoing processing.
2- For any further copies requested by the data subject, the controller may charge a reasonable fee based on administrative costs."
"1 - The controller shall provide a copy of the personal data undergoing processing. 2- For any further copies requested by the data subject, the controller may charge a reasonable fee based on administrative costs."
https://gdpr-info.eu/art-15-gdpr/