I need a formula that tells me which year a project goes cashflow postive....
So lets says I have the following table:

A B
1 Year Cash
2 1 -100
3 2 -75
4 3 -25
5 4 50
6 5 200

So in the case above, I would want the formula to return Year 4 (A5) as that
is the first year the project goes cash flow positive.

Any ideas?

Thank you,