The easiest way may be to put a table (in A1:C7 or anywhere convenient)
saying something like:
Mon 1 4
Tue 1 6
Wed 1 Undefined
Thu 1 5
Fri 3 5
Sat 2 Undefined
Sun 1 5
(and fill in the undefined gaps as appropriate)

then use the formula like:
=AJ183+IF(AN183="air",VLOOKUP(AX183,A1:C7,2,FALSE) ,VLOOKUP(AX183,A1:C7,3,FALSE))

You could add additional protection for invalid inputs if you haven't
protected against them earlier.
--
David Biddulph

"DP7" wrote in message
...
Hi, I have this formula which is half working. I need it to say first of
all
If cell AN="AIR" and the AX="Fri" then add 3 days to AJ. if AX = "sat" &
AN="air" add 2 days to AJ. Otherwise if AN = "air" and the AX is any of
the
days not mentioned above add 1 to AJ. After that if AN is blank and
AX="mon"
add 4 to AJ, if ax ="tue" and 6 to AJ.... so on and so fort. The formula
as
I have does not pick up the last set of values if AN, the "AIR" cell is
Blank. I hope my explanation was clear enough. If not I will try to
clarify
further. See formula below


=IF(AND(AN183="AIR",AX183="Fri"),AJ183+3,IF(AND(AN 183="AIR",AX183="Sat"),AJ183+2,IF(OR(AN183="AIR",A X183="Mon",AX183="Tue",AX183="Wed",AX183="Thur",AX 183="Sun"),AJ183+1,IF(AX183="Mon",AJ183+4,IF(AX183 ="Tue",AJ183+6,IF(AX183="thu",AJ183+5,IF(AX183="fr i",AJ183+5,IF(AX183="sun",AJ183+5,""))))))))