Calculates US Postal Service Priority Mail shipping rates. Since the rate tables are located on your web site, there is no reliance on anyone else to produce your rates. Includes an admin utility so you can modify rates online.

How Will I Get Rate and Zone Updates?
Use the admin utility to type them in. Relax. Its not so bad. There are about 125 zone records and 70 rate records (The rate records current with this tag's release date are already input).