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Tuesday  7am - 8:30pm = 11 hrs, 30 mins
Wednesday 9:40am - 4.45 am  = 12hrs (took a longbreak  between 4 pm and 6 60) , came back and worked overnight from 7 pm till 4:45 am, though the hours after 12 am are not counted as discussed with Greg.
Thursday  9am - 3pm = 6 hrs left early
Friday 8 30am - 8pm = 12hrs

Total = 41hrs 30 mins