So we proceeded on a cost plus basis, also  the  cost plus environment  actually  brings the partners together because if there are three of us working on a cost plus contract and I have a problem, my two partners rush to help me because clearly  there's some more profit for them, erm  if  the only difficulty with cost plus contract of course is that unless you have a a real  ceiling on the total er costs that you're going to pay, it may keep on rising far higher than you'd ever imagined.