There are two opportunities here. One, to build on the answer that was just provided there, is that in certain cases there are deliberate choices made to leave stock levels at zero because the materiel can be acquired fairly rapidly at a local level and it's not worth storing. In other cases, there may be material that has shelf life, and we make decisions about just how much to stock so that we don't have materiel expiring.
The other element that I just thought I'd build on from the question is something that we haven't spoken about yet, and that is ensuring that below the bar codes the materiel identification information for every one of those half-billion items is correct. Without that, we won't know whether or not things are about to expire or whether or not they have a shelf life. That materiel information layer is yet another major part of our action plan to move forward and improve the system.