Doubt in generating EazyBI graphic

Hello there,
I need some help with this graphic please. In it, I want so show the cumulative average days in transition status till now; in other words, if an incidence is being executed since january 2023 and it has 90 days of execution, it should appear:

31 days execución in january
31+28 days of execución in february
31+28+31 in marzo

Thank you.

Hi there. Please, anyone could take a look on this?