How to get value for Matrix from different table with blank values

Hello Power BI Community!

I am trying to create Matrix Table using value from different tables.

Below Picture is the Sales Record.

You can see that there are no sales for Product B in May.

Also there are no sales for all Products for June.

So these numbers should be blank in matrix.

Below is what I want to do.

When I tried this by straight forward just using this Sales Record Table, 

I dont see numbers for June.

Also this does not work when I have more transaction table, like Inventory Table etc.

So I made Product×Period (Cross Joined) master table and add columns to get sales number from the sales record.

※This way I can get numbers from other different tables like Inventory etc.

But I dont know the DAX or Query to accomplish this.

Is there any way I can do this??

Please help!!

And thank you very much for looking through and helping in advance.