Including shipping costs into product price is not good for many reasons:
- Your product price will increase unnecessary.
- You wouldn't be able to charge different shipping amounts people from different geographic locations. E.g. locals would pay less, international customers more.
- People often buy multiple items to save on shipping. This wouldn't be the case if you hide shipping costs inside the product price.
- You couldn't offer Free Shipping with Coupons or Bundles.
That's just a few things that came to mind.
I'd rereplacement shipping costs to US, Canada and Europe (or International) at the post office and setup those 3 shipping profiles.