One of the things we're trying to do through ship six and beyond is the approach to the strategy, in this case how we take a more business approach to how we're building ships through the AOPS and into the surface combatants.
To your question, the sixth ship is approximately $400 million, which is continuing to see a reduction ship over ship in real dollars. A decision was made to extend the build period. We're going to make a point of stretching out the overall program for two years so we can maintain workforce and continuity in the yard.
Why is that? As we've implemented this strategy on both coasts and other work that we've done, a huge cost driver for us is labour and what the industry calls “green labour”, which is getting a workforce up and running in the context of a shipyard. We put in $150 million to wilfully stretch out the work, but at significant savings, to maintain the workforce for surface combatants.