By setting up a price list, you can ensure standardization and accuracy of pricing when invoicing. You can also ensure price changes are applied at the correct time and to all invoices they affect.
To use the billing price list, you must activate the feature through Billing Settings, choose to use price lists for specific contracts and select the appropriate price list for each contract line.
To maintain the price list, select Billing Price List from the Financial section of Administration. You can then process a search (as described at Searching and Filters to list matching options:
Click Add to create a record.
For a listed entry, click 
then:
•Open to edit the record.
•Clone to create a list with the same general details as the selected one. Enter a new code and change other information as necessary.
•Delete to delete the record, providing it is not in use for a contract.