Assuming the data you presented was in the order you wanted, and the letters
that are tagged are never more than 1 character, you could create 2 helper
columns.

Helper column 1:
=ISTEXT(A2)

Helper column 2:
=IF(ISNUMBER(A2),A2,VALUE(LEFT(A2,LEN(A2)-1)))

Then go to Data, sort. Sort by Helper 1, then Helper 2.

--
Best Regards,

Luke M
*Remember to click "yes" if this post helped you!*


"wavers3" wrote:

I have been reading for the better part of two hours trying all of your
suggestions. I am still unable to get the following data to sort. I have
formatted the cells. The data is similar to this:
1
2
5
8
10
13
3a
3b
4a
6a
7a
7b
9a
11a
12a
12b

With data going on up into the hundreds.
trying all the formulas that were out there did not bring me even close. I
am using 2007.

Thank you for your help...