Can you explain how this works? I live in Canada, shipping is $8 flat rate, and all the taxes and shipping are totalled on the "preview" screen. I've never pa

Can you explain how this works? I live in Canada, shipping is $8 flat rate, and all the taxes and shipping are totalled on the "preview" screen. I've never paid customs fees in all the years of ordering, so for my situation I know the full price upfront before ordering