Don't know about short term, contract prices for F-15 are quite steady(and slowly rising), it's actually F-35 which is still gaining economies of scale. If anything, F-15E development cost(FbW adaptation) was already essentially absorbed by export customers...Short term. Then again when F35A was earlier block it cost as much as current early F15EX. My point is the 30million dollar figure doesn’t make any sense at all. It sounds much like claims of the cost of SU57 or Armata costing fractions of current equivalent.
+as I've mentioned earlier, 30 mil USD = 2.2 billion rubbles = ~63 mil USD in 2014. Exchange rate doesn't affect Russian arms industry in any significant way.