We dont use the Euro. We pay the same price day to day in nok for local goods and get charged the same price in euros for imported goods. So if the krone drops in value compared to the Euro, the price in nok goes up. So someone could come to Norway when the crown was strong and the locally produced fish would seem very expensive compared to imported meat. Or come when the krone was weak against the Euro and think the fish was really cheap. Im not saying the price would fluctuate significantly day to day but it stands to reason that you could regard the fish as cheap and someone visiting at a different time might think it’s expensive. Even if the price in isk is the same.