Thanks for having a look at it anyway!
RIGHT!!!
Don't understand this but I think I have a FIX if nothing else.
*Before doing any of this I would make a copy of the original - I make no guarantees, I offer no refunds

Double-click on a cell with the number "1" in it - it has to be a "1".
Click on Copy on the toolbar.
Then highlight all of the cells you want to make SUMmable.
From the Toolbar, choose Edit...PASTE SPECIAL...and choose MULTIPLY (listed in the OPERATION section).
What this does is take a perfectly well formatted "1" and whenever it sees a number, whether it is formatted as a number or not, it multiplies it by 1 and then your totals work...
Ta-da!


