(DOCSP-20616): Updated the Total Data Returned wording. (#226)

* (DOCSP-20616): Updated the Total Data Returned wording.

* (DOCSP-20616): Incorporated Stephen's feedback.

Author: corryroot

source/billing.txt

@@ -22,14 +22,18 @@ minimum of **10 MB** or **$0.00005 per query**.
 You can use partitioning strategies and compression in |aws| |s3| to
 reduce the amount of processed data.
 
-Total Data Returned
-~~~~~~~~~~~~~~~~~~~
+Total Data Returned and Transferred
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-|service| charges for the total number of bytes returned by
-|data-lake|. This total is the sum of the following data transfers:
+|service| charges for the total number of bytes returned and 
+transferred by |data-lake|. This total is the sum of all the following 
+data transfers:
 
-- The number of bytes transferred between |data-lake| service nodes
+- The number of bytes transferred between internal |data-lake| service 
+  nodes
 - The number of bytes transferred from |data-lake| to the client
+- The number of bytes written by |data-lake| during 
+  :ref:`adl-out-stage` or :ref:`adl-merge-stage` operations
 
 Returned data is billed as outlined in the :guilabel:`Data Transfer
 Fees` section of the `Atlas pricing page