I don't know what this function would be called (which is probably why I
haven't already found an answer!).

I use a template for purchase orders and I would like to be able to choose
the size/dimensions (Column C) of the piece we are ordering first and THEN
have the item number fill in (Column A) once the size is ordered. This is how
I am given the part to order - by size/dimension only, never by item number.

I have the sizes/dimensions in a validation list currently but I am using
copy/paste to fill in the item number.

I tried to make a validation list with the catalog number in 1 column and
the size/dimensions in the column next to it but it messes up my formatting
that way.

This is basically how the PO format is laid out:

Column A Column B Column C
Item# Item Size/Dimension
(i.e. OSG404-0312-BN11 Drill Bit 1/32 4FLSE REG CARB BALL-TiAIN)

Any suggestions? I hope this makes sense to everyone out there.

Thanks!