Multiple array formula

HI Guys
Hope you can help as I’m having an issue with coming up with a multiple array formula for my predicament

In the attached spreadsheet, Sheet 1 has been set up so downloaded data can be pasted in and fill columns A to FA – the data can fill from 2 to 5000 rows depending the size of the invoice information for that particular week.

In Column AW (starting from cell AW2), when the data is pasted in to the sheet, there is a reference beginning with ULO. The report pasted into sheet 2 from our internal system dictates whether this ULO reference / order is a mail order or a trade order. If it is blank, then it is assigned a Returns label.

This works fine however, when there is NO data in the template, in column FB (starting at FB2), the formula currently says that if column AW has no data or blank, then return the result as Returns.

For development purposes, I need a formula in Column FB (starting in cell FB2) that says – and apologies as I have had to write this literally:-
If Cell A1=”” then FB2=”” (before data is pasted) however, if A1<>”” and AW2=”” (after data is pasted) then the result is “Returns” in addition to the Vlookup formula distinguishing the remaining references as mail order or trade (see formula in cell FB2).

Is this possible to write in a single formula?

If so, I would be very grateful – your assistance is appreciated as always

J
EE_Example.xls