High you all,

I need a single formula that gives me, for a rectangular area, the
number of rows that have at least one non blank cell.

Say, for example, that in A1:M20 all the cells are blank except

B10 contains "X"
F10 contains 9
C15 contains "X"

The result is 2, because only 2 rows, numbers 10 and 15, contain some
data

I have been able the get the correct figure using intermediate
results. What I need now is a single formula that gives me the final
result directly.

Thank you