The simple answer is, no one knows. You won't know until the doors open to enter into discussions with the United States. You won't know until those discussions then proceed to what Canada may be willing to contribute or could contribute to effectively get access.
The numbers that Professor Byers is using are mythical numbers. You can't take the value of investment in ground-based missile defence since roughly 1996 and say that somehow the U.S. is going to charge us a proportion of that. What if they will? Nor will they ask us to invest to pay back research and development costs. That's not going to be on. We're talking in terms of the Canadian investment, specifically what the cost to buy the product will be, and then you get into other sets of issues. Otherwise, no one knows.