Customer Prices let you select a Customer and enter their Price to be used for all sales.
Part Numbers allow you to use alternate part numbers to find or reference your items.
Part Numbers support a variety of key functions each of which are enabled separately.
You might choose to use the feature to insert Vendor Part Number on Purchase Orders. This does not mean you have activated the tool for using Customer Part Numbers, yet.
Please contact support@bigbusiness.com with any questions about leveraging options.