Since Autodesk has moved away from Credits to Flex Tokens you might want a breakdown of what you get for those additionally charged services.

In the link below find out what each Autodesk program will charge Flex Tokens / Credits.

There are even a few free products and services located at the bottom of this link.

https://www.autodesk.com/benefits/flex/flex-rate-sheet

You can even estimate custom Token usage with this link below:

https://www.autodesk.com/benefits/flex/estimator-tool?mktvar004=com_na_dep_flexratesheet_estimate-tokens