Check if user is active - DAX

I need a dax formula to know if a user is active if he bought the product id 2 in the last 3 months according to a date filter .

I want to create a measure to do that and mark the value '1' if he is or '0' if he is not.

Example:

Fact Sales

IdSale 	IdProduct 	Date 	IdCustomer
1	1	        18/06/2018	1
2	2	        17/05/2018	1
3	1	        12/05/2016	2
4	2	        12/05/2016	2

DimCustomer	

IdCustomer 	Name
1	        Ana
2	        Ted

DimProduct
	
IdProduct 	NameProduct
1	        ProductB
2	        ProductA

Ted would be evaluated marked as '1', because he bought the product 2 in 17/07/2018, and he is in the the last 3 months period.

If I would filter, I'd like to see the sum of all customers who was active, I mean: Customers who bought product 2 in the last 3 months according to my date filter