For what it is worth:
I have heard that one helicopter operator pays the Government minimum permitted daily allowance of NoK450 (about £35 current exchange rate) daily and £8.50 per day taxable. I have heard that the other helicopter company is paying the NoK450 plus another NoK660 per day.
To eat reasonably in Norway steer clear of hotels. Good meals can cost about NoK150-200.
Its the alcohol that costs!!!