Step by step
Set reorder levels
On each product, the level at which you want to reorder, for each branch if they sell differently, and how many days the supplier takes to deliver.
Read the suggestions
The report lists what is at or below its level, with a suggested order: enough for the delivery days plus two weeks of sales.
Create purchase order
Press "Create purchase order": a purchase order opens with every suggested line. Choose the supplier, remove what you do not need, and save.