I have employee take leave report like that:
I want to sum time in each group.

(#Group ABC Company)

AL	SL	SIL	ML
8:00	12:45	10:00	4:30
8:15	34:35	8:00	5:50

(#Group XYZ Company)

AL	SL	SIL	ML
5:00	6:00	20:50	0:00
8:00	16:45	8:20	8:00
8:00	7:00	2:00	12:00

 

I want to get result like that:

(#Group ABC Company)

AL	SL	SIL	ML
8:00	12:45	10:00	4:30
8:15	34:35	8:00	5:50

16:15                     47:20                     18:00                     10:20

(#Group XYZ Company)

AL	SL	SIL	ML
5:00	6:00	20:50	0:00
8:00	16:45	8:20	8:00
8:00	7:00	2:00	12:00

21:00                     29:45                     31:10                     20:00

and in the report have many group.

Thank in Advance!