Go to the specific customer file, press F12 for P-Matrix.  Create a new record with F2 new.  Enter in LAB for the line code and P-Level with a "Q" and then the price will be your price per hour for all services for that customer.  http://help.pluss.co/HELP/PTM%20Vision%20Help/default.aspx?pageid=Welcome#pageid=labor_price_matrix