Here is the detail calculation of Work Record Card:

Adjustment

Following the calculation from the sample  above:

In : 7.15 – 7.16 = 1 minute (OT morning)

In : 7.50 – 11.24 = 3 hrs 34 mins, detail:

7.50 – 08.00 = 10 minutes (OT morning)

08.00 – 11.24 = 3 hrs 24 mins (Normal working hours)

In : 11.32 – 16.28 = 4 hrs 56 min, detail:

11.32 – 12.00 = 28 mins (Normal working hours)

12.00 – 13.00 = 1 hr (OT afternoon)

13.00 – 16.28 = 3 hrs 28 mins

In : 16.33 – 18.27 = 1 hrs 54 mins, detail:

16.33 – 17.00 = 27 mins (Normal working hours)

17.00 – 18.27 = 1 hrs 27 mins (OT night)

In : 19.22 – 19.25 = 3 mins (OT night)

Total working hours : 1 minute + 3 hrs 34 mins + 4 hrs 56 min + 1 hrs 54 mins + 3 mins (OT night) = 10 hrs 28 mins. –> 28/60 = 0.4

10 hrs 28 mins = 10.4 hours.