I haven't done the level of detailed analysis that you're speaking of, but what I do know is that the capital costs are higher in the case of the oil sands versus conventional oil. The exploration costs are lower in the oil sands versus conventional oil, because they don't have to drill. They have a good sense of the reserve; they know where it is and how to access it. So there are some trade-offs there, depending on which costs you're looking at.
On October 19th, 2006. See this statement in context.