I am using Goal Seek to determine an interest rate for an investment stream
that returns a zero. The investment is irrgular in amount but the period is
annual for each transaction.

My problem is I am getting different answers depending on the source of the
numbers.

BUT the imported investment stream is the same regardless of the source. If
I run it from one source Goal Seek returns 3.1362%. If I flip to the "other"
source, Goal Seek returns 3.2072%

I am stymied as to why there are different results depending on identical
sources.

Below is the investment stream

8,616.77
8,616.77
8,616.77
8,616.77
8,616.77
8,616.77
8,616.77
8,616.77
8,616.77
8,616.77
8,616.77
8,616.77
8,616.77
8,616.77
8,616.77
8,616.77
3,269.89
2,062.33
940.42
-165.44
-18,279.87
-20,304.66
-22,524.53
-25,033.38
-27,804.93