Using a calculation to show which column a figure falls under

I've attached a simple Excel sheet to hopefully help explain what I want to do. Basically I have Column A to show the Project I am working on and Columns B-M show the months of the year with the figures under certain months. In Column N I just want to show where a figure falls under a certain month, I want Column N to show the month (header) that particular figure is under e.g. N2 should return a value of "March", N3 ro return a value "June" and N4 to return a value "April/September".

Can anyone suggest a suitable calculation for this?

Thanks in advance.

Gadgetgeeze