How to create a po from one supplier and many departments

[daniel]

I cannot find a way to create a PO based on 1 supplier and multiple
departments. I tried the following but they don't work.

Department Name = Dept1

OR Department Name = Dept2

OR Department Name = Dept3

AND Supplier Name = Supplier1

and

(Department Name = Dept1

OR Department Name = Dept2

OR Department Name = Dept3)

AND Supplier Name = Supplier1

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