I have calculated shipping active and have tried a few different shipping apps. When calculating one product to different postal addresses it works well, but, when I add multiple units it does not offer a rate. I believe it is due to the calculation combining dimensions and weight into on "package" and exceeding the carriers volumetric weight maximum. All I want is to send them out as separate packages. If the customer buys 1 unit and the calculated shipping is $10, then if they buy 2 units the calculated shipping is $20 (2 units x $10). any suggestions would be appreciated.