[GNC] Exchange rate fluctuation changes historic amounts in P&L and BS

[G R Hewitt]

Hello Everyone,

Basics:
GnuCash 5.6; MacOS High Sierra 10.13.6
Using Sterling as the base currency and Euros.

The problem:
A few days ago I bought something in euros (€150) and paid for it in
sterling (£132.27) and the GnuCash system worked out that the rate was
0.8818. In the P&L the item was properly shown as £132.27. The card account
payment showed £132.27 and the euro expense account showed €150.00. All
well and good.

I bought something else a few days later in the same manner as above, but
the exchange rate had changed, all well and good too - card account and
expense account transactions were correct.

On running the P&L I noted that the £132.27 of the first transaction above
was now less at around £128 and some pence instead of the expected £132.27.
I checked the card account and it was still at £132.27 and the euro account
was still at €150.

Why is this and is there a way to have the correct figures shown in the P&L
without them jumping up and down as the rate changes.

Thanks in advance,

G.