Obviously the day has 3 operating periods. Ist period 6:35 to 10:38 (4:03), 2nd period 11:05am to 2:30pm (3:35), 3rd period 2:50pm to 5:45pm (2:55) and if my maths are correct thats 10:23 of client billing time, 1:18 of owner operational costs in a total 11:42 day