AB testing pricing formula versioning

Wondering how other teams have managed this.
We’re planning to test a heuristic pricing formula against existing calculations. I imagine we will go through a few versions before we get it right.

For consistency we want customers to see the formula they saw at initial quote if they come back. E.g. customer comes on Monday and saw version 0 of the formula. A week later we’re now using version 1. But this customer comes back and for consistency we want …

customer customers datascience managed planning pricing test testing through versioning versions