Australia has been granted permission by the U.S. government to order up to 3,900 GBU-53/B Small Diameter Bomb Increment II (SDB II) for its F-35A fleet.
By U.S. Air Force photo by Staff Sgt. Staci Miller (http://www.luke.af.mil/news/story.asp?id=123434914) [Public domain], via Wikimedia Commons
The estimated total case value is $815 million.