I run a sign shop and ship to hotels nationwide. I must box it, tape it, print a label for it, call it into pickup. I must calculate on weight and size length x width x height and figure how much it costs me to ship then I add $2.00 to cover all of my labor, box, tape, etc. An average box weighing 1 lb 10" x 10" x 5" will cost me 8.25 to ship and that is because I have a contract. so I charge$10.75.