Set the rate for your services on the item screen as the rate the general public would be charged
then in menu lists>price level list
create a price level list, name it, and adjust the price per item as needed. If you have premier or enterprise this is much more flexible than in pro, and IMO worth the upgrade. on teh customer record you can assign the price level list to the customer, and when you put an item on an invoice the price level list will automatically fill in. You can also select the price level list when you want to on any invoice or sales receipt
one price level list can be assigned to multiple customers, so it is best to make a list that fits most, like preferred customer, wholesale, retail, or something
Menu Edit>Preferences>Sales & Customers>Company tab > check mark use price levels to turn on price level lists
