I have the following formula that I am practicing/experimenting with in, say, cell F15:
=SUM(INDEX(C10:D16,2,2):INDEX(C10:D16,4,2))
Column C contains valid dates, column D contains numbers.
Whenever I change F15, say the 4,2 -> 5,2, the format of cell F15 reverts to "dates" no matter how I have previously formatted it.
What is happening?
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