Anything the Government is connected in building - the price is nearly 100 times the real cost - $600.00 hammer. This was many years ago. Probably the same cost today would be $2200 hammer! Government does not build anything worthwhile without the unions being involved in inflated prices!
At the same time, that sort of thing can be demagogued, too. Consider the $1000 ash try added into the cockpits of some cargo aircraft. The paperwork burden required to do anything in a military aircraft made it impossible to make money doing that job for a measly $1000. It was unavoidable, if the pilots were going to smoke. It turned out that there were sports cars on the market for which you would have to pay $300 to replace an ash try.In that situation, the manufacturer would have been better off to have done the job gratis rather than take the PR hit.
There was also the case of the model airplane which was needed to demonstrate the solution to a problem in that aircraft type. The engineer bought the model out of his own pocket for $10; if he had requisitioned it he would have waited at least half a year - and meeting all the requirements would have caused the cost to be at least $50 in paperwork.