#SumTimes for the #NumWorks calculator sums the times with start times & end times for work days in a week. The times are given in the sexagesimal format h.mmss i.e. 14:50:00 is 14.5000 and -07:45:06.18 is -7.450618. The result is in #sexagesimal. https://my.numworks.com/python/mobluse/sumtimes