This is the format used to calculate the total charges and demolitions needed for a particular mission like emplacing an Abatis.
17:13
8:16
27:14
21:55
9:48
13:28
4:53
7:00
16:08
8:45
14:56
11:51
8:15
6:52
5:33
7:14
9:42
5:39
14:31
15:52
8:41
7:32
9:40
3:55