goods originating in a country shall be those wholly obtained or produced in that country. Goods whose production involved more than one country shall be deemed to originate in the country where they underwent their last, substantial, economically justified processing or working in an undertaking equipped for that purpose and resulting in the manufacture of a new product or representing an important stage of manufacture., concerns products in whose manufacture several countries have been involved. origin of such a product is the country where the last processing took place