borneoman: There's a overview of currencies here:
http://www.norges-bank.no/Statistikk/Valutakurser/ (the site is Norwegian, it shows the Norwegian currency for different currencies, such as Euros). As for Euros, 1 Euro is as much as between 9,5 - 9,7 NOK these days. So that would be approximately 75 Euros, yes. The ticket price for Friday is approximately 70 Euros (685 NOK). The highest ticket price is at 735 NOK, which is approximately 75 Euros. I hope this isn't too confusing.