I would like to know the row position of a specified column and value in a
table. If multiple occurences of the specified value occur in a particular
column, I want the bottom most row position returned. For example, in the
folowing table, the function would specify column 2 (or B), value of 6, and
return 3 since the bottom most 6 in column 2 is row 3.

A B C
1 5 8
2 6 9
3 6 10
4 7 11