- Assuming this is the Swedish "Krona" you are talking about, it depends somewhat on exchange rates between the Euro and the Krona, which is about 11 Korna per Euro as of today (13:38, 17 February 2009 (UTC)). In doing a quick check with the official website, that is about kr 50 if you select Sweden as your home country when you create your member account.
Me, i'm swedish, so "det kostar 75 kr i månaden med mobil och 50kr med visa-kort." or "it costs 75 SEK/ month using cellphone, and 50 SEK using Visa-card."
//hope i helped.