Exclude a document from word count

When I’m writing in Scrivener I like to use outline mode to keep a track of word counts, using the “Total Words” column.

The problem is, when I’m writing I like to keep documents specifically for quotations and notes. I like to nest these documents under the document that they are going to be used in. But this means that when I do a word count using the “Total Words” column, these documents are included. Is the way I can specify which documents should be included and excluded when I do a word count in this way?