All functions return result of ###

Any function that I use returns a result of ###. For example, just as test, I entered 1,2,3 in cells and =SUM(F9:F11) below. It returns ###. This is the same result if I use AVERAGE, MEDIAN , etc. What am I missing? I did a format check and the source cells and function cells are set to numbers .

Thanks!
Fen

Looks like your columns are too narrow for the output. Try to make them wider, or choose smaller font.