I have just spent two entire days going over the EXTREMELY COMPLICATED MATH involved in trading shift hours. General relativity, eat yer heart out; you got nothing on such difficult concepts as “I will take your three-hour shift next Friday if you work my three-hour shift this Wednesday."
Watching my co-worker deliberately scribble down hours in pencil, complain that I’m confusing her, and start over about twenty times, would be funny if I didn’t have to try to walk her through it.*
*This is mitigated slightly by my tendency to hear the 3¼" floppy running noise when someone is trying to think.