Its important to note the air force number is something like unit budget divided by number of hours flown divided by number of planes, so its fairly realistic,

Its important to note the air force number is something like unit budget divided by number of hours flown divided by number of planes, so its fairly realistic, but the specifically named manufacturer provided cost estimate is something like gas and oil and scheduled maint assuming nothing ever breaks and there's no enemy action and things wear out according to the blueprints. Also it costs the same to feed a pilot of any aircraft, ditto ATC and commo guys and all the rear echelon folks, although none of those costs were included in the mfgrs estimate. No matter how badly the numbers are fudged its probably still one order of magnitude cheaper, perhaps a little more.