Hi,
Bit of a weird one to ask, so bear with me 
We have a data set that is imported and work flowed. At the end of the workflow the data looks like this:
| Record | Supplier | Purchaser | PO Number | Location |
| 1 | A | NULL | 20714 | BBBB |
| 2 | A | Bob S | 21677 | BBBB |
| 3 | B | NULL | 21655 | EEEE |
| 4 | B | NULL | 21655 | EEEE |
| 5 | B | Mary Y | 21341 | EEEE |
| 6 | B | NULL | 21342 | EEEE |
| 7 | A | NULL | 21678 | BBBB |
We can see from the table above there are NULLs in Purchaser. Using columns Supplier and Location we can see that record 2 should be Bob, and records 3, 4, and 6 should belong to Mary.
Is it possible / how does one then use the current data set to fill in the NULLs? I have tried filtering the dataset, then joining (vlookup) on the original data set but this does not work.
Any suggestions?
Thanks.