Price Groups provide a method of collecting price items together for discounting/commission purposes.
For example, a group called "Long Courses" could be a group of long-term courses, against which a special rate of Discount/Commission is applied.

Select "Add":

Each price group needs to be allocated a Code and a Name.

First select a school, & then select items to be used in the Price Group as follows.
Highlight a Price Item and click on the left arrow, or to select multiple codes, see the instructions in blue at the top of the screen.
Once the relevant codes have been selected, click the OK button.