We do our own labels, so we frequently buy from Amazon. We have a corporate account. I just order, give a P.O. number (though you don't have to,) and the books start to appear about 5 days later. We try to always order $35 or more and get the free shipping. Occasionally, we pay for shipping when we are really in a hurry, but the free shipping is usually faster than they say it will be except around big holidays. The bills come once per month to our accounts receivable department. -- Ann Lane Librarian, Saint Francis High School