Bus fare from Dublin Airport to Belfast?

A friend is travelling to Belfast (Europa Bus Station) from Dublin Airport on Sat., 4 June 2011 probably after 12:30 in the afternoon (after 12:30 -- plane scheduled to arrive about 11:30). We cannot find the BUS fare from the web-site. Does anyone know what the bus fare is? Goldlink has cancelled the service (we read). Thank you. :-)