I am trying to sum rows based on some criteria.
(The Group column is only here to explain that the rows come in "3s").
This is the data:
<colgroup><col span="5"></colgroup><tbody>
Group
Field1
Field2
Field3
Field4
1
a
aa
aaa
1
1
a
w
aaa
2
1
a
aa
aaa
3
2
d
dd
ddd
5
2...