Challenge with summing data in a column based on many and varied consecutive occurences in another column.

LLPlates

Board Regular
Joined
Jul 13, 2012
Messages
84
Hi,
Am out of my league again and any help would be greatly appreciated.

Column 'P' contains the number of consecutive occurrences of an event, the function in this cell is =IF(A2>0,N2,"")

Column 'W' contains the data I need to total based on the occurrences.

Column 'X' is the example of what I am trying to achieve.

The work book contains hundreds of rows of data and the occurences can vary from 1 to 30

Thank you for reading.:)

L
M
N
O
P
Q
R
S
T
U
V
W
X
1
1
1
#
675
2
2
2
#
175
3
3
3
#
525
4
4
4
#
2300
5
5
5
#
4825
6
6
6
#
850
7
7
7
#
2025
8
8
8
#
4100
15475
9
1
1
1
1
1
#
1500
10
1
1
#
350
11
2
2
#
1575
1925
12
1
1
1
1
1
#
500
13
1
1
2
2
2
#
1450
14
1
1
#
1175
15
2
2
#
3500
16
3
3
#
750
5425
17
1
1
1
1
1
#
2050
18
1
1
2
2
2
#
1025
19
1
1
#
2425
20
1
1
1
1
1
#
1525
21
1
1
2
2
2
#
25
22
1
1
#
1400
23
1
1
1
1
1
#
800
24
1
1
2
2
2
#
850
25
1
1
3
3
3
#
1050
26
1
1
4
4
4
#
325
1375
27
1
1
#
1075
28
2
2
#
325

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Thanks for your reply.
Row 9 should be blank because column P is blank
but row 19 should read 2425 - well spotted. Row 22 should
read 1400.
 
Upvote 0
Thanks for your reply.
Row 9 should be blank because column P is blank
but row 19 should read 2425 - well spotted. Row 22 should
read 1400.

Insert a row at the beginning and enter a 0 in X1.

In X2 enter and copy down:

=IF(N2<>"",IF(N3="",SUMIF($N$2:N2,"<>",$W$2:W2)-SUM($X$1:X1),""),"")

The formula uses the N range instead of P range for they seem not to differ. If that's an incorrect observation, switch to the latter range.
 
Upvote 0

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