Hello.
I suggest you make a FOR-NEXT VBA Loop over all lines in your Excel WB sheet. Fill required variables with fields from line.
A second Loop (e.g. DO UNTIL) for the MRP-area value. There I suggest to record a scroll of existing MRP-lines as it is easier to take everytime top line for compare than dynamic move.
If MRP-area field value = Excel field value your update Action can initate.
If MRP-area value not exist or Loop runs into empty field next line from FOR-NEXT Loop should called.
Hope this give you some ideas.
Best regards
Holger