Hi, I have really big doubt, I have MXN as my base currency, I sometimes make transaction in USD and EUR, USD invoices are paid with a usd bank account, how does it reflexes in module account.account in MXN or USD??

another thing is that I pay the EUR invoices with any MXN or USD and I noticed that on Suppliers Payments form there is a field that says "Exchange Rate", if i change the currency the exchange rate stays the same, do I have to write the rate of the transaction? for examaple a EUR invoice of X pay with MXN so what to do in taht case?

Hope someone can help

Thanks in advance