Well, Program Unit Cost : $ 95.3 million [I am not sure about what is included].

Unit Procurement Cost: $ 78.4 million [the cost if you buy only one].

$53.8 million [for each one of a large number (100+?) purchased on a multi-year procurement contract].

Programme Unit cost includes fixed costs: development, production tooling, etc.

Unit procurement cost is the cost to the Pentagon of each aircraft, including essential equipment, spares, & so on, excluding fixed costs. What is actually paid out by the time the aircraft is in a squadron, ready to go. It does not include weapons or (IIRC) training.

the $53.8 mn “flyaway” cost is for an empty equipped aircraft.

There is huge confusion between these numbers, & comparisons of aircraft A with aircraft B are often done using different definitions.