On the Service Offering dialog box, click Price Books tab.
In the All Price Books list, identify all that are applicable for the Service Offering.
Select them one by one and click 
to move
to Associated Price Books list.
Click Save and Close.
Price Books tab displays list of all the available Price Books of the Business Organization.
Steps:
On the Service Offering dialog box, click Price Books tab.
In the All Price Books list, identify all that are applicable for the Service Offering.
Select them one by one and click to move
to Associated Price Books list.
Click Save and Close.
Service
Offering dialog box