The US Pentagon has reported it expects a US$4.5 billion saving in the cost of acquiring its planned fleet of 2,443 F-35s, equating to a one per cent drop from the earlier projected US$395.7 billion to US$391.2 billion.
http://australianaviation.com.au/201...-f-35-savings/
http://australianaviation.com.au/201...-f-35-savings/