I have three kind of products with different shipment rates and I'm unable to set ushop to work properly...
Books: A flat price plus a quantity for every book, with 6 different rates depending on the destination; Spain, Rest of EU, Rest of Europe, US&Canada, South and Center America, Worldwide.
Posters: A flat price for any quantity of posters if shipped localy (Spain). Five other configurations with a flat price from 1 to 12 posters and other flat price for more than 12 (the five others are; Rest of EU, Rest of Europe, US&Canada, South and Center America, Worldwide) Furthermore, If a customer buy one or more books and some posters, the posters shipment must be free (only the book shipment must be charged)
Electronic subscription: No shipment cost. If added with books, posters or both, the shipment cost for this item must be 0.00