Whats going on guys; those of you who charge shipping to the customer (I generally offer free shipping but want to add an option for them to expedite if they want to pay for it) how do you handle charging the right amount as far as weight and package size? Do you pre-classify items to a specific weight and dimension and use that for shipping calculation? Do you just go off weight alone? Is that dry product weight or weight + additional packing material, tape, box etc? Just trying to see the direction I should approach for adding the customers ability to purchase UPS shipping service.