Drill through with a date restriction

[Adidas]

Hi All,
I have a report that presents purchase invoices on the item level (Page1 based on Table1).
for each item, I need to enable a drill through to the sales page (Page2 based on Table2)
and show only sales that took place after the purchase date of this item.
Since the relationship between table 1 and table 2 is many to many, I decided to build an intermediate table as so:

On the sales page, I enabled the "keep all filters" feature,
so I'm able to bring the purchase date from the main page (Page1) into the table on the drill through destination page (page2).
I was not able to build a measure that captures the passed filter and restrict the sales table only to sales that occurred after the purchase date.
can someone help me with that, please?

[amitchandak]

@Adidas , Something like this

Measure =
var _max = maxx(allselected(Table), Table[Purchase date])
return
calculate(countrows(Table), filter(All(Table), Table[Purchase date] >_max))

But better join purchase date with date table and use that

Measure =
var _max = maxx(allselected(Date), Date[date])
return
calculate(countrows(Table), filter(All(Date), Date[date] >_max))

[Adidas]

Thanks, @amitchandak,

It didn't work for me, since "Purchase table" and "Sales table" are only connected via the "Item" field (throughout an intermediate table), the moment I put the new measure inside the Sales table the table exploded.