Revaluation of Invoices each month to give historic aged debt

Hello

I have a client requirement to show debt balances over historic dates. Multiple currencies exist so I used the DAX from “Handling Multiple Currencies” video and it all looked good, however but using the fx rate at the invoice date only it locks in that exchange rate rather than recalculating the conversion for the next month end etc. This means that is the matching credit note or payment is several months later the netting off of the two transactions leaves an fx balance.
I have attached an example in the pbix , many thanks for any guidance.
L
FX Issue on Currency Conversion over time.pbix (645.7 KB)

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