yup. The first additional aircraft after the initial run is complete is comparitively dirt cheap. Way back when the B-1 was being delivered, the program manager gave a talk at the Naval War College about his program and what an additional production could potentially cost. Each of the 100 B-1's cost some tremendous amount of money. The 101st B-1 would have cost 1/4 of what the first 100 cost.
The same with the F-22 and any other aircraft. The false economy of cutting the production run or reducing the annual production run drives up the unit cost becase the entire cost of the development is spread over fewer aircraft and inneficient production rates push costs up. The next batch of aircraft don't have the development overhead to pay for, so they cost much, much less.
Which is why we should go into serial production of the F-22 (and replace the F-15 fleet before they fall apart) and why additional sales of the F-35 come in at a much lower cost.
The more of anything you make (planes, tanks, ships, light bulbs, cars, advanced flight sim gaming computers, etc.) the cheaper the unit cost becomes. Big time.