Euro/US dollar in the last 6 months has been between $1.14 and $1.10. Probably easier to keep at $1.15 rather than change every month...(and a few % more in the till <img src="http://www.traveltalkonline.com/forums/images/graemlins/Grin.gif" alt="" />)
Charge in Euro on a no exchange fee CC and solve the problem