You could solve that by replacing the =--RIGHT(F9) formula by
=IF(F9="","",--RIGHT(F9))
--
David Biddulph

"Aundria123" wrote in message
...
David,

Thanks for trying. This forumla only works if every sell in the range of
F9:AD9 has something in it. Some cells are empty and so I get a value
error.

This works if every cell is populated but we only see the client 1-3 times
a
week.

Any other ideas?

"David Biddulph" wrote:

Sorry, I should have said =--RIGHT(F9), not =RIGHT(F9), as the latter
produces text, rather than a number. I apologise for causing you
confusion.
--
David Biddulph

"Aundria123" wrote in message
...
David,

I did what you suggested. I started with F42 to AD42, which
corresponds
with F9 to AD9. I have only numbers in my cell on the second page. I
then
put the below formula in AE9 (UNUSED UNITS column) but now the value is
always the same as in C9 (TOTAL UNITS). It's like the formula is no
long
doing the SUM / 2 part.

=(C9-(SUM(F42:AD42))/2)

What gives?

Thanks!

"David Biddulph" wrote:

One option is to produce a set of helper columns, so from "T 2" in F9
you
could extract the 2 by =RIGHT(F9), and copy across appropriately. Use
the
new columns in your SUM (and hide the new columns if you want to).
--
David Biddulph

"Aundria123" wrote in message
...
Hello,

I'm a new user to excel and forumlas. I have a column that has a
total
number of units in C9. In column C8 are names of people. I have to
either
put next to the names T 2, T 4, E 2 or E4 (F9 to AD9). I am using
the
following formula to subtract from the total number of units for
each
day
in
the month.

Formula in Cell AE9: =(C9-(SUM(F9:AD9))/2)

This works perfectly for me when I only insert number 2 or 4. In
column
AE,it gives me the number of UNUSED UNITs.

Well now my boss wants me to enter the letter T or E with the
NUMBERS,
and
I
don't know how to adjust this forumla to IGNORE the letter so that
the
formula continues to work. Right now when I add a letter to the
cell,
the
formula ignores the number.

I hope this makes sense as I'm desperate for a solution. I have
digged
through a bunch of help sites, but I'm not technical enough to
understand.

Thank you for your help!