If you look at refining margin and you look at crude oil, can you actually separate cost from profit? If you look at crude oil, if you're dealing with tar sands, the cost of extracting that from the earth is a lot more than the cost of extracting it from the sands in Saudi Arabia. The cost of refining certain types of crude is much more expensive than the cost of refining other types of crude. Is there actually a way in which to measure at least that extracted and refined within Canada, as to what is actually cost versus profit?
Mr. McTeague, I'd like the witnesses to answer.