Thanks for the responses.
I'm being given an already filled-out .xlsx, but I'm not seeing a difference
if I save it to .ods.
The cells are identified as in H:MM format, but the actual measurements are
in minutes and seconds (with a few H:MM:SS sprinkled in). It's a bit
confusing because what I see in the Cell is "1:18" as in one minute and
eighteen seconds, but what I see in the input line is "01:18:00 AM". The
hours and minutes makes sense, but what is that "AM" doing there? If I
switch to text format, I get decimal numbers (e.g. 0.0541666666666667 in the
Completely not understanding, I was doing some text manipulation (copy to
notepad, add "00:" to the front end, copy back) to try to get the values
recognized as minutes and seconds, and that appears to have caused the
screw-up. I suppose pursuing why those cells add like time (seconds roll
over to minutes at 60, etc.) when they only look like time values, but don't
sum() at all should be left for another day.
If I ignore the entries with hours (which I suspect are erroneous anyway)
and simply divide the original cells by 60, and set the formatting to
[H]:MM:SS, I appear to be getting what I need and sum() works as I would
Sorry for the confusion.
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