[Semibug] LibreOffice is summing incorrectly

[andre at buskvekster.mooo.com]

I suggest you check Gnumeric. I don't know how it does rounding,
but I suspect you will like it.

I don't use spreadsheets but have written Gnumeric extensions,
and therefore I read on the Gnumeric mailing list that, while
LibreOffice copies mistakes from Microsoft Excel for compatibility,
Gnumeric is less concerned with compatibility and thus is willing
to do things correctly. And there are other nice things about Gnumeric.