1. Drag a Table object onto the content area and label it Product Sales.
2. Add ProductType as a dimension.
3. Add the following expression as the first measure and label it Total Sales:

Sum (Sales)

4. Add the following expression as the second measure and label it Sub Category Sales:

Sum ({<Category = {$(=concat (distinct [SubCategory], 
   ','))} >} Sales) 

5. You should have a table that looks similar to the following screenshot: