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=DAYS360(DATEVALUE("3/3/2005"),TODAY())
in a cell, and then move off the cell, and back onto the cell, the same string is not present in the cel at that point?
Or are you saying, you want to type something like
=DAYS360(3/3/2005,4/4/2005)
and have it compute things from there.
Or do you want something else?