Conditional Sum Forumula DAX Help

heebnash ,  Do you want to switch dates or measure. to switch date you can have a common date table and inactive joins. and use userelationship to work on that

https://radacad.com/userelationship-or-role-playing-dimension-dealing-with-inactive-relationships-in-power-bi

https://community.powerbi.com/t5/Community-Blog/HR-Analytics-Active-Employee-Hire-and-Termination-trend/ba-p/882970

In case you need to swap measures based on selection

measure slicer
https://www.youtube.com/watch?v=b9352Vxuj-M
https://community.powerbi.com/t5/Desktop/Slicer-MTD-QTD-YTD-to-filter-dates-using-the-slicer/td-p/500115
https://radacad.com/change-the-column-or-measure-value-in-a-power-bi-visual-by-selection-of-the-slicer-parameter-table-pattern