According to the CBC G8/G20 costs have grown exponentially. I can only infer that if the first 3 days cost $1,000,000,000, then the next 3 days will cost $1,000,000,000,000,000,000 (the cost squared, typically the smallest of what is considered exponential growth). That's unfortunate, because I think that's more money than the entire world has, so we're probably all going to starve to death now.
If you clicked "read more" my abject apologies. That was it.