may be wrong but I think in Canada they will charge you the Canadian total--but when you look at your CC charge it will be less as they convert it to US. That is always the way it works when we are actually there and shopping. You never really know from one day to the next actually "how much" until you see the charge.
At the top of their site ... there are little flag icons for USA or Canada.
I only opened one of my 4 ... the date on it is 06/2014