I'm trying to create a formula that will tell me where the last
occurance of #N/A occurs in a table. If I have,

1 2 3 4 5
#N/A #N/A #N/A 2% 8%

I want a formula to tell me that the last occurance of #N/A is in
column 3, or that the first occurance of a real number is in column 4.
You can assume that the sets of #N/A will be contiguous.

Thank you.
-bgetson