I am basically having 2 times 2 columns of data that i have to compare
and find if it matches (i am comparing existing inventory with the
inventory we would most urgently need):

it would look approximately like this:

1 2 3 4 5
Part# quantity Part# quantity
V90mdm 3 vxcvxc 1
Gmcrd 7 CDROM 0
Opmse 7 CDRW 1
Wlopm 3 dfdf 3
Ethernt 8 dsa 0
CDROM 2 DVDRW 2
CDRW 1 Ethernt 8
DVDRW 2 fasd 0
Th128 4 Gmcrd 4
Th256 6 Opmse 0
sag 3
Th128 4
Th256 6
V90mdm 1
vcx 7
vcxz 7
vxcz 0
Wlopm 0

where I would have to find out in column3 if the column 1(part#) and
column 2(part quantity) exactly match with the columns 4 and 5. column3
would have to display answers like yes (enough stock) or no(not enough
stock) or even display the number of missing parts. however it might
also happen that there is no part in column4 at all.

I have already tried with various formulas including if and isna and
vlookup but couldn't make it work for 2 criteria together. i only
managed to find out the match from column 1 and column 4 and display it
as yes or no in column3.

does anyone have any suggestions, please?

Thx.

Tom