Okay, I'd like to go quickly to capital cost allowance.
During the study on the oil sands, there was a lot of discussion in committee about just wiping out the accelerated CCA. One of the concerns I always had is that no one could ever really quantify exactly what that is for all the issues you've brought about. There are nuances to it, like specific investments in each project in the oil sands and that. So when this $300 million—I'd heard that anything from $300 million to $500 million might be the case.
I have two questions. First, when did you really come up with this $300 million as the figure for what's going to be lost to the economy? Then, when that has replaced accelerated capital cost allowance for the new environmental, do we roughly know what kind of impact on the economy and government revenue that's going to have?