1 50,000.00
2 (20,000.00)
3 (10,000.00)
4 (50,000.00)
5 2,000.00
6 10,000.00
7 10,000.00
8 30,000.00
9 20,000.00


Given the above data, how do I count the number of data
until the sum starts going positive?

manually, sum starts to be positive with the result 22,000
which is data no. 8.

What formula do I use to get result 8?