Hi,
The most efficient solution for this use case would require to use the hidden measure and dimension for precise tracking of the status changes of the issues during the sprint.
The following formula should do that:
( [Measures].[Story Points added],
[Transition Status].[Ready for UAT],
[Transition field].[Status])
This formula expects that you are using the Sprint dimension in your report.
There can be other solutions, but formulas with tuples are most efficient.
Kindly,
Janis, eazyBI