Crewing...
Because of duty/flight time, crew of 3 is required on both types...
Captain + F/O + F/E crew cost in Argentina is less than 2 captains + 1 F/O.
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Well thats not quite the same, a FE does not count as augmented crew.
-200/-400 2 Pilots+1FE/2Pilots, up to 14h 3Pilots+2FE/3 Pilots, more than 14h.
Well at least its like this un europe, may be different in argentina.