We can certainly try to give you some more information on it, but some of the other folks at the table probably have equally sophisticated views of it.
As was pointed out by a number of the speakers, the price of what the future cost will be of oil is speculation: it's what people believe the price is to be in the future. So that's what we typically will see in the media. It may not actually be the price at which they can acquire crude oil and get it shipped to or brought to the location at which they want it; it's a price at a place in the world.
In North America, it's typically Cushing, Oklahoma, which is the West Texas intermediate. In Canadian terms, you have an Edmonton par, which is delivery to Edmonton. But getting from Edmonton to Sarnia, there is a fair bit of distance that has to occur through pipelines and through tolls and a number of other things. Similar in the world is Brent, which is delivered to the U.K.
So it's the variation of moving the crude around as well as the type of crude we're speaking to. You see a lot of simplifications to help people understand, but they don't help us appreciate the variation we're trying to understand as consumers as it moves from a future to a reality to delivery, and then to actually being moved into a good that can be moved to a retail outlet for sale.