How to add boolean as true above intersection of same month
I have a module with 2 dimension & 1 Line item.
Dimension 1 - Anaplan Month time (In columns)
Dimension 2 - Time List ( In Rows : Similar to Anaplan time month)
Line item name - Boolean up true.
In Time List , I have 5 months:
Now , please see the attached Image.
The way you can see boolean ticked as true for same month intersection & months above it in same column which I have done manually but I want to add a formula where I can automate it.
I tried doing multiple workaround(made finditem between time list & anaplan time) , but still have not find the desired result.
Can someone help !!!.