1 2 3 4 5 6 7 8 9 10 11
bal <<< i 2007/03/01 23:00:00 A o 2007/03/02 01:00:00 i 2007/03/11 23:00:00 B o 2007/03/12 01:00:00 >>>1 2.00h A 2.00h B -------------------- 4.00h