DOCSP-19988 Add data processed cost example and explanation (#219)

* DOCSP-19988 Add data processed cost example and explanation

* Apply suggestions from code review

Committing Melissa's copy review edits.

Co-authored-by: Melissa Mahoney <[email protected]>

* Update source/index.txt

Co-authored-by: Melissa Mahoney <[email protected]>

Co-authored-by: Melissa Mahoney <[email protected]>

Author: kanchana-mongodb

source/includes/fact-partition-cost-benefit.rst

@@ -0,0 +1,11 @@
+You incur "Data Processed" costs for the amount of data that 
+{+adl+} processes to return results for your queries in addition to the 
+"Data Returned" cost for the amount of data that {+adl+} returns. For 
+example, for a 10 GB file, you incur the following "Data 
+Processed" cost in addition to the "Data Returned" cost: 
+
+- If you have no partitions, {+adl+} reads the entire file to return  
+  results for the query. Therefore, you incur 10 GB of "Data 
+  Processed" cost.
+- If you have 10 partitions of 1 GB each, {+adl+} targets and reads a 
+  single partition. Therefore, you incur 1 GB of "Data Processed" cost.

source/index.txt

@@ -155,6 +155,8 @@ processes from your |aws| S3 buckets, rounded up to the nearest
 megabyte. |service| charges **$5.00 per TB** of processed data, with a 
 minimum of **10 MB** or **$0.00005 per query**.
 
+.. include:: /includes/fact-partition-cost-benefit.rst
+
 You can use partitioning strategies and compression in |aws| |s3| to
 reduce the amount of processed data.
 

source/query/query-data-lake.txt

@@ -102,6 +102,8 @@ processed.
 
 .. include:: /includes/fact-doc-order-in-query-result.rst
 
+.. include:: /includes/fact-partition-cost-benefit.rst
+
 .. _query-atlas:
 
 Querying Data in Your |service| Cluster