Companies don't like having their costs in one currency, and their revenue in another. It's called currency risk (http://en.wikipedia.org/wiki/Foreign_exchange_

Companies don't like having their costs in one currency, and their revenue in another. It's called currency risk (http://en.wikipedia.org/wiki/Foreign_exchange_risk http://en.wikipedia.org/wiki/Foreign_exchange_risk) and companies generally try to avoid it or hedge against it.