Buying a "kontantkort"

Hello everybody, I am going to be in Solna for two weeks and I would like to buy a mobile card there. Does anybody knows how much it costs and where can I buy it?

Thank you!

Vero :)

I will suggest you go for Tele2- conviq Amigos and it cost about 80kr(8eur). The talk time starts from 100kr(10eur). Depending on how often you call home, 500kr should be enough for 2 weeks