The cost of norwegians uniform package including flight cases, overnight cases and so on is circa €1000, a plastic jacket is not much use in Norway in winter!!
Norwegian do not operate like any other LoCo airline in Europe, crew routinely night stop around the net work, it means they can get 5 or sometimes 6 sectors out of a crew and have the aircraft available at the right place for the first wave in the following morning, this includes overnight flight from the Canary Isle to Finland & North Norway & Sweden, which at near 7 hours are too long to do on a return pair, landing at 5 am taking into account the two hour time difference, food service, lights dimmed and sleep, wake up call 20 minutes before landing, no crew or FD PA's, the goal is very high aircraft utilisation, check flight radar 24 after 11pm and see who is flying.
They are user friendly to pax with RM, happy to carry dog's & cat's, unmins, cargo, & connecting flights co-ordinated, the quality is much closer to SWISS than easy jet, let alone Ryanair, the UK volume is tiny compared to its European operations.
Their operation is cost efficient, much of the back office functions are outsourced, the aircraft have EFB with 3G update on the ground, no paper load sheets or flight plans or paper manuals, all data comes SMS to Capt & F/o (who get a phone allowance) and takes seconds to complete hence the very high OTP
I have no idea what the financial performance is, but tomorrow they publish their last quarter of 2013 figures and that will include the period which the 787 tech problems.