Created attachment 127832 [details] example ods Example ods shows in column B the desired results in yellow and the "wrong" results in orange. It seems that SUMIF cannot summarize time values (it seems not to be an format issue).
Created attachment 127848 [details] example file corrected See revised file: (1) Removed apostrophe from "Time" values. (2) Changed time formate from MM:SS to HH:MM:SS.
See comment 1.
Comment on attachment 127848 [details] example file corrected great, thanks a lot :-)