Merge pull request #261245 from DaleKoetke/docs-editor/cost-logs-1702571048

Update cost-logs.md

Author: prmerger-automator[bot]

articles/azure-monitor/logs/cost-logs.md

@@ -101,6 +101,8 @@ In addition to data ingestion, there's a charge for the retention of data in eac
 
 For more information on data retention and archiving, including how to configure these settings and access archived data, see [Configure data retention and archive policies in Azure Monitor Logs](data-retention-archive.md).
 
+(Note that the Log Analytics Purge feature doesn't affect your retention costs. To lower retention costs, decrease the retention period for the workspace or for specific tables.)
+
 ## Search jobs
 
 Searching against archived logs uses [search jobs](search-jobs.md). Search jobs are asynchronous queries that fetch records into a new search table within your workspace for further analytics. Search jobs are billed by the number of GB of data scanned on each day that's accessed to perform the search.
@@ -309,4 +311,3 @@ This query isn't an exact replication of how usage is calculated, but it provide
 - See [Set daily cap on Log Analytics workspace](daily-cap.md) to control your costs by configuring a maximum volume that might be ingested in a workspace each day.
 - See [Azure Monitor best practices - Cost management](../best-practices-cost.md) for best practices on configuring and managing Azure Monitor to minimize your charges.
 
-