I think that's something, though, that I'm not so sure is being communicated all that well or has been communicated here today. It explains some of the fluctuations and why they happen, at least at the retail level. So I appreciate your being candid about that.
This is a question for Mr. Labonté. I noticed that your latest Fuel Focus report mentions that the price of a barrel is reflected almost instantaneously in the price of a litre, notably because retailers use the last-in, first-out accounting method. In layman's terms, can you explain for Canadians what that method is, and how it could conceivably lead to price fluctuations?