I am a pretty competent user of Excel, but on some occassions, a simple
formula like SUM will not work. Whether doing it using the Sum (Sigma) icon
or creating the formula in the formula bar (ex. =A12+A13) it is not working.
I have tried clearing and deleting the cells and recreating them, it doesn't
matter. If I redo the formula with the actual number values in each cell it
will work but it is as if it isn't reading the values in the cells properly.
I have tried looking at the cell properties and can not find anything
obvious. Please help. Thank you. - CG
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