JSF - Norway going the way the hen is kicking...

Your cost "analysis" is way off base.

Norway will, with the exception of a handful of initial aircraft, be buying full rate production (FRP) aircraft. The wikipedia cost for the F-35 is a Low Rate Initial Production (LRIP) jet, it includes the recurring flyaway cost, non-recurring flyaway cost, and ancillary equipment. The flyaway cost itself is projected to decline to 83.4 million in 2019, which corresponds to 70 million dollars in 2013 dollars at 3% inflation.

There is no reason the US would consider the Gripen, since its performance is not significantly different to that of the F-16.