And those accountants have been consistently wrong in their predictions of how much the various LRIP aircraft will cost... LM has consistently delivered them at well below the ever-increasingly-hysterical estimates.
Do we know what the real costs for full-production aircraft will be?
No, and neither do the accountants or Lockheed-Martin.
However, LM seems to be delivering aircraft at costs closer to their estimates than to the accountant's predictions, so I'm not all that worried... yet.