I've been using test account and I've got succsessfull billing information over my registered email. But I am able to figure out where this amount 100.00 (USD) is coming from which I've not provided anywhere else.
========= ORDER INFORMATION =========
Invoice : INV-12345
Description : Description
Amount : 100.00 (USD)
Payment Method: MasterCard xxxx0015
Transaction Type: Authorization and Capture
04-30-2020 11:23 AM