Here are two Google Sheets for Revenue Modeling of Remittances.
There is a single-corridor (simplex version) which was made about 3-4 years back: Revenue Modeling Google Sheet for Remittances – Simplex Version
Then I made this version, which is up to date and does a better job of modeling customer behavior with multiple payment instruments.
I hope you enjoy. Use at your own risk and please note, there is no copyright or any sort of guarantees provided on this spreadsheet. Please double and triple check for errors and/or omissions.