Holy crap. Bar or package store?
Thats from the supermarket shelf. In a bar it would be more expensive. A beer in a bar in Norway normally ranges from $7-12, depending on what type of beer. I haven't seen Founders in any of the bars here, but I would guess around $8-$9 for a bottle if that were the case.
Of course you're standard draft lager/pilsner is not quite as expensive in the stores. For example a 0,5 liter can of beer from Hansa (one of the largest breweries in Norway) is currently at $3,8 in the shelf. But compared to other countries I guess it's still pretty damn expensive.
I know that very well Here in Switzerland its very similar with alcohol. Not as crazy expensive but still not cheap. In a bar it can happen that a normal beer is also between 6-7$. You're getting also ripped off if you want to have a special foreign beer, which can set you back around 10$
But just as you said. When you're getting the cheap can beer. You'll get 24x 0,5l for 14$