Update periodic-backup-restore-introduction.md

Added the region information for the backup

Author: kanshiG

articles/cosmos-db/periodic-backup-restore-introduction.md

@@ -7,7 +7,7 @@ ms.author: govindk
 ms.reviewer: sidandrews
 ms.service: cosmos-db
 ms.topic: conceptual
-ms.date: 03/21/2023
+ms.date: 04/02/2023
 ms.custom: ignite-2022
 ---
 
@@ -41,7 +41,7 @@ For Azure Synapse Link enabled accounts, analytical store data isn't included in
 
 Two backups are provided free and extra backups are charged according to the region-based pricing for backup storage described in [backup storage pricing](https://azure.microsoft.com/pricing/details/cosmos-db/).
 
-For example, consider a scenario where Backup Retention is configured to **240 hrs** (or **10 days**) and Backup Interval is configured to **24 hours**. This configuration implies that there are **10** copies of the backup data. If you have **1 TB** of data in an Azure region, the cost for backup storage in a given month would be: `0.12 * 1000 * 8`
+For example, consider a scenario where Backup Retention is configured to **240 hrs** (or **10 days**) and Backup Interval is configured to **24 hours**. This configuration implies that there are **10** copies of the backup data. If you have **1 TB** of data in an Azure West US region, the cost for backup storage in a given month would be: `0.12 * 1000 * 8`
 
 ## Required permissions to manage retention or restoration