Oranges must be expensive in Norway, they don't grow there, they have to be shipped in from the Mediterranean. Norway is also a very prosperous country, so you'd expect retail prices to be high.

Although juice is much cheaper as a frozen concentrate, lets go for whole, fresh fruit, at the retail level...

According to

http://www.numbeo.com/cost-of-living/country_result.jsp?country=Norway ,

the median grocery price of a kg of fresh oranges is 20 Norwegian Kroner or about $3.40.

An average orange weighs about 200g and yields a 1/4 cup of juice. (Yeah, this is all on the internet) So a kilo of fruit should render up about 5/4 cups, or enough for a ten-ounce glass.
Yeah, its expensive, but not eight bucks.

According to Bloomberg, orange futures in New York City were at $1.40 a pound this summer, which is probably considerably less than supermarket prices, So Norwegian and American juice prices are comparable.