Hello, I have a problem with joomshopping. That's fine but I have a problem with the shipment, which of course I asked you but I do not know why I can not make myself understood. I would like to put a shipping price based on the quantity of products that are purchased. For example if you buy a product the shipping cost is 15 euro. If you purchase two products spending is 30 and so on. So 15 Euros for each product purchased. They told me to install a plugin but it is not very good because I have to manually put the price x any product added product such as 1 to 2 products I put 20 euro and so on. but I can not add attributes so for all products, I'd like you did in the account automatically every time I go to buy the quantity side of the site.
I really hope someone can help me to find a solution.