Zoho Currnecy conversion rates

Zoho Currnecy conversion rates

Hello,
I activated recently the plan that allow me to use multiple currency and I'm missing something.

My main currency is CAD but I sometimes get invoiced in USD. The credit card convert it to CAD when they charge it and usually keep add a fee directly to the conversion rate. 

Result : The exchange rate of the given day never match the amount I paid.
How do you actually handly this in your Zoho books ? 

I usually put their conversion rates so the amount match and move on. In the past, Quickbook was suggesting to fix the rate automatically when I match the corresponding transaction with the expense. However, in Zoho Books, they tell me to make a new transactions everytime which is annoying.

Am I actually suppose to create an account for Exchange rate fee or something or just keep adjusting the exchange rate ? I have to do it manually in Zoho books which is almost as long as calculating it everytime manually. I wanted a way to save time but it's a failure so far.

Thanks