VERIFIED SOLUTION i

Is there a chart that explains the USPS Manifest Price Category Codes

The USPS does provide information for USPS-Manifest-Price-Category-Codes and that information is found in Publication 401 Guide to the Manifest Mailing System.
You can use the URL provided-https://ribbs.usps.gov/mac/documents/tech_guides/pubs/Pub_401.pdf or use Google and search for the term USPS Publication 401.

 
UPDATED:  October 4, 2017