Financial Postings for Credit Memo

Hi experts,

My client is have the below requirement so for please kindly assist me ASAP.

1. Financial posting for credit memo will use spot rate prevailing on date of original invoice
as permitted by country

The above requirement is when we post credit memo for customers, at the time the client want to update currency exchange rate will be same as original invoice exchange rate in credit memo.

2. Financial document for cancellation will use the translation date of the original
invoice.

This is the requirement is if cancel the FI document, the exchange rate should pickup from original invoice exchange rate.

3. Financial posting for re-bill will use spot rate prevailing on date of new re-bill
document creation as permitted by country.
4. Financial document will use the translation date of the original invoice.

Thanks