In the top left help
section at Cool Site Guide you will see instructions to configure
shipping and one of the options will be for weight based. There are too
many combinations of drop shippers and client destinations to be able
to enter in the zip code and it compute the shipping automatically as
many clients use multiple drop shippers from different sources. If you
choose to do the weight based set up it will add the total weight of
the items in your shopping cart and give the carriers you specified.
You will have to come up with an average range to cover the locations.
Ex. 1-10lbs might cost 10$ to California but 5$ to Florida, so you can set up your shipping at 7$ (medium) to cover the costs.