Contact

Email hello@resellingmath.com.

If a fee has changed, please include a link to the marketplace's announcement or updated help page. A screenshot of a receipt helps too, but the calculators are only updated from the marketplace's published pages, so the link is what lets a fix go out.

If a result looks wrong, copy the calculator's page address after entering your numbers and send it along with the amount the marketplace actually charged. The address holds your inputs, so the same result can be reproduced exactly.

Requests for a new marketplace or a missing option are welcome too.