Hi I need your help.

I need your help to make automatic counting of how many staffs in a range of hour (Breakfast/Lunch/Dinner) and their overtime, and one of the problem their is they make some label or text combine with hours.
there are even split time happens.


4 to close
3 to close
9-2 / 7-11
9-2 / Off
3 to 12 / Runner
3 to 12 / BAR
3 to 12 / Expo

Please help.