I think what we have provided is all the assumptions that go into the model, everything that's assumed in terms of what measures are being put in place or are already in place or are going to be put in placeāa comprehensive list of that from the federal and provincial governments. We have included a description of how the modelling is done, and the idea of introducing a carbon tax into the model and then removing it again to determine the actual impact of the carbon price. As we've indicated, within that there's a huge amount of modelling detail that operates. I think what we're trying to say is that we've tried to show all the assumptions that the model makes and how you can make a determination of model price reductions.
Derek, please feel free to add.