Depends on whether you drop it off at the location, and you have an account, or don't, or if you have it picked up.
Those 3 different scenarios are charged differently with some or all carriers.
With Fedex, i've paid as much as $60~ for a 12" X 10" X 6" box when dropping it off without having an account. I think they average it out to 5 pounds too, even if it's not one pound.
When having it picked up, and having the weight over estimated by the driver, I would pay maybe $35-$40 for the same box.
When having it picked up and having the exact weight used, or slightly under estimated, I would pay $30 or less for that same box.
Another thing is the packing material. Newspaper weighs alot!!!
I learned the hard way when I realized I was paying about $15 out of that $60 to ship old newspaper.. lol
Use styrofoam peanuts, or plastic packaging airbags. Both weigh nothing and can literally reduce the cost to almost half.
I remember I used to put flat layers down, then crumbled, then shredded around the snake, then crumbled, then flat to look nice.. lol... glad i'm not doing that anymore!
I tip my driver for Holidays and all... if he measures the exact weight or less, and if I save $5 a box, and if I ship only 100 boxes a year, that's $500 extra in my pocket. I'll take that!
Another thing is to follow up on delivery commitment times.. I would say atleast 1 out of 10 times it's late, and I call and get a full refund! I always offer it back to the customer and they almost always refuse to take it! If you average that out, the one of 10, the refund means you save about $5 on each box.
Hope this helps!!
Take care, Joe
-----
Thanks and take care - Joe Rollo
'Tis not the stongest of the species that will eventually survive, nor the most intelligent, but the one most responsive to change' Charles Darwin