Pivot Table Calculated Field - Sum of Column A * Min of Column B

I am looking to create a calculated field where a sum of column A is multiplied by a min of column B. What seems to be happening instead is simply a multiplication of a sum of both columns.

So:

Column A | Column B
123           .97
456           .97
789           .97
123           .94
456           .95
789           .93

So, what I want
2736 * .93
What seems to be happening
2736 * 5.73

My formula in the calculated field is

=Sum('Column A') * Min('Column B')

How can I get the result I want in a Pivot Table?