There are. And on a quarterly basis, Purolator appears in front of Canada Post. We issue and review every single cost, and they'll question costs. It'll go on a day-by-day basis. So the reconciliation takes us, actually, a number of days, and it's based on that reconciliation. If there is a cost, whether it's de-icing or fuel--and jet fuel has been fairly volatile, much more so than diesel or gas—whether the weather plays a part in it, or if there are any restrictions or changes with an airport that would cause us to use different runways or change our operating schedules, they make sure it's all reconciled so we're paying exactly...and they're not paying one penny more than they should be under the terms of the contract.
