I did enjoy that link though and printed off some references...
my Po gave me sheets about pricing(more like a book) I have my own scale, my own thickness board to measure etc...but then I ship 30-50 orders out a day! and yes, I go the PO for it all! I love my postal lady but she is allowed to smoke in the truck....I am NOT putting fabric in that truck...so I take it to the PO....