I would like to see a function to handle adding/subtracting/running total/sum of elapsed times (usually minutes & seconds). The solutions usually presented require either breaking up a MM:SS "number" into multiple columns, or some hack that uses time-of-day (which isn't very reliable and prone to significant errors).
Just to add to this: I have been looking for a simple, straightforward way to do this in a chart/spreadsheet for over 25 years now, and I'm surprised it's never been implemented.
(In reply to James E. LaBarre from comment #0) > The solutions usually presented Please describe which solutions you point to, which specific data you work with, what result you see, and what is your expectation. I would expect, that for a set of durations, a simple SUM(A1:B10), formatted as a duration (i.e., "[MM]:SS" using square brackets to denote durations, as opposed to wall clock time) would do the job.