"Federal Government Cost Overruns"
Chris Edwards and Nicole Kaeding
September 1, 2015

https://www.downsizinggovernment.org/government-cost-overruns

Table 1 provides a sampling of cost overruns on defense projects. The costs are the total per-unit amounts in constant 2015 dollars, including both development and procurement costs. 

Table 1. Sampling of Defense Cost Overruns
Defense Projects
 
Per-Unit Cost Estimate and Date of Estimate
Original
 
Recent or Final
 
Littoral Combat Ship
$360m (2004)
 
$667m (2014)
 
Evolved Expendable Launch Vehicle
$102m (1998)
 
$376m (2013)
 
Joint Strike Fighter (F-35)
$79m (2001)
 
$138m (2013)
 
JPALS Landing System
$29m (2008)
 
$77m (2014)
 
G/ATOR Radar
$24m (2005)
 
$61m (2014)
 
Note: Per-unit costs in constant 2015 dollars. m=million.

Go READ.

"Top 10 Failed Defense Programs of the RMA Era"
Stephen Rodriguez
December 2, 2014

http://warontherocks.com/2014/12/top-10-failed-defense-programs-of-the-rma-era/

By the way, a LOT of money is spent, maybe "wasted," before any contract is awarded, or before anything is built, and we have no list of those programs.  The Small ICBM, for example, spent billions, but the program was cancelled without declaring an official "overrun."

Be aware!     Beware!