Hi.
i have one problem.
I try to calculate shipping by weight

lets say the client ordered two products
every product have weight 5kg (lets say 5kg cost 10 euro and 10 or less kg costs 12 euro).
if someone orders two products then the shipping cost is 2X5kg=20 euro.
The zen calculate this as single products. but i want to send the products of one order at once.
The proper result would be 10kg=12 euro and not 20!