How do a add a group of numbers in reverse until a condition is met?

Water Billing

New Member
Joined
Apr 2, 2019
Messages
1
I am trying to add a group of numbers together until I reach a 0 in a cell; however, I am starting with the last number in a column and going in reverse.

100
200
300
0
450
200
600

<tbody>
</tbody>

i.e. I would like to start with the last number (600) and add until I reach a zero (600+200+450). Can someone help me? Thank you.
 

Excel Facts

Workdays for a market open Mon, Wed, Friday?
Yes! Use "0101011" for the weekend argument in NETWORKDAYS.INTL or WORKDAY.INTL. The 7 digits start on Monday. 1 means it is a weekend.

Marcelo Branco

MrExcel MVP
Joined
Aug 23, 2010
Messages
17,017
Office Version
  1. 2019
  2. 2010
Platform
  1. Windows
Welcome to Mr Excel forum

Try


A
B
C
1
Numbers​
Formula​
2
100​
1250​
3
200​
4
300​
5
0​
6
450​
7
200​
8
600​

Formula in C2
=SUM(INDEX(A2:A8,LOOKUP(2,1/(A2:A8=0),ROW(A2:A8)-ROW(A2)+1)):A8)

Hope this helps

M.
 
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