Hello,

We wish to inform you that the exchange rate used for your April payment was incorrect. We're working hard to investigate this error and will update you once we have additional details on how we intend to resolve the issue.

If you normally receive communication for us in a language other than English, we will provide additional information in your preferred language next week.

We apologize for the inconvenience and appreciate your patience.

Sincerely,
   The Google AdSense Team

They calculate exchange rates wrongly