This is not so straight forward as
described. SAP is using different conversion types. The conversion can be based
on the transaction date, on an average per month, on a planned conversion rate
and so on. You need to check with your customer, which of the conversions they
want. You can calculate with a conversion factor or have different key figures
for each currency. Or you can do the conversion on the flight - which would
have an impact on the performance.
I have a nice document which I can send you. Please send me your e-mail details.