In 1956, the Canadian dollar was at $1.09 U. S.; ups and downs typical of all currencies. Those big Walmarts are on both sides of the border, unfortunately.
Anyone who has used Pampers with kids knows how expensive their use is, and goes where they are cheapest.

Mexico, like many other countries emerging into a globalized economy, has many poor that tend to be bypassed by the growing middle class. NAFTA will be important in bringing North American economies together.

And that cardboard is worth money, even here in Canada, for use in recycled products. It should never go to the landfill dump, as it so often does in the United States of Waste (and here, too, to be truthful).