Finding alternative products bought by same customers

[HxH]

Hi everyone, 
I have a sales table in which every row corresponds to a sale. In every row there is the customerID, the Product Category and Product Subcategory. What I want to do is have a visual (or two, if it must be done with two different measures) that shows the Product Categories and Subcategories that are alternative to the selected one. 

To simplify: let's say I have ProductCategory X and Y and Customers A,B and C. Customer A and B have bought product X but customer C hasn't. All 3 of them have bought product Y. What I want to see when I select ProductCategory X in the slicer is the number of sales of product Y ONLY for customer A and B, since they are the ones who have bought the product selected in the slicer at least once. 

I would also like to do the same if I select a subcategory: if I select X1 I would like to see the sales of subcategories X2,X3...,Xn only for those customers who have bought X1 at least once. 

Thanks for any help/advice. 

[v-frfei-msft]

Hi @HxH ,

Kindly share your sample data and excepted result to me if you don't have any Confidential Information. Please upload your files to One Drive and share the link here.

[HxH · Accepted solution]

I'm sorry but I can't share the data 😕 

However I've found something very useful to solve the problem on Dax Patterns, using the Basket Analysis pattern. 
Here is the link if anyone needs it to solve situations similar to mine: https://www.daxpatterns.com/basket-analysis/