Hello, as far as I know this page doesn't have any source table. It uses dynamic data means it pulls the exchange rates from the table 330 "Currency Exchange Rate".
The necessary data is saved as global variable inside the page, when you choose your currency code.
If you change the value it is only saved inside that page (Dialog).
I don't know if it's possible to get data from a page inside a report - never tried that before.
As a workaround you can add a new field to the SalesHeader and push the changed Relational Exch. Rate Amount to that field.
So you can add that field to your report...
Tom