I would say it depends on the flight. In some cases, we have very little notice for planning these events, and the cost estimates are coming in just prior to the actual execution—sometimes as we're issuing the contract. When we have longer lead times, as with this particular flight, we can have earlier estimates.
Each catering company does it differently. In many cases, the cost estimates are not fully understood until further into the contracting process, because of the way they implement it. That information comes to the Royal Canadian Air Force for us to manage and then to go ahead and pay the bill.