There is a way which may or may not be useful:
Run the custom report, I chose summary. Click on customize and change the display columns by to income statement, and change the display rows by column to class. This switches the columns & rows on the format. Now on the report select collapse and you will see your classes in rows and can click on them to see sub classes if you want and the income statement accounts are displayed across the top.
I am using this for items that have classes assigned to them so it works as I further filtered accounts to include only sales, COS and returns.
It's not great as when i add the qty column to the report display it wont give me the parent quantity total and I still have to click to see the sub classes totals.
Hope this helps
