Question :
How to know my promotion priority control?
Solution :
Priority control only apply to Item Price, Item Group Price & Item Type Price.
Higher priority value means higher priority.
Example:
Promotion A, Priority = 0, Item ABC = 4.00
Promotion B, Priority = 2, Item ABC = 4.50
Promotion C, Priority = 3, Item ABC = 5.00
During transaction the system shall select = 5.00
--Source from AutoCount Wiki --