You can use sales type groups, for instance, to classify sales types by department. The use of sales type groups does not have any financial consequences. A sales type can be linked to only one sales type group.
Example
Sales type  | 
Sales type group  | 
Service  | 
Service department  | 
Repairs  | 
Service department  | 
Industry machine sales  | 
Sales department  | 
Consumer machine sales  | 
Sales department  |