Add custom container sessions billing details

Author: anthonychu

articles/container-apps/billing.md

@@ -7,7 +7,7 @@ ms.service: azure-container-apps
 ms.custom:
   - ignite-2023
 ms.topic: conceptual
-ms.date: 05/02/2024
+ms.date: 10/02/2024
 ms.author: cshoe
 ---
 
@@ -122,6 +122,12 @@ Code interpreter sessions are billed based on running duration for the number al
 
 Custom container sessions are billed using the [Dedicated plan](#dedicated-plan), based on the amount of compute resources used to run the session pool and active sessions.
 
+Each custom container session pool runs on dedicated *E16* compute instances. The number of instances allocated to the session pool is based on the number of active and ready sessions in the pool. To view the number of instances currently allocated to a session pool, use the following Azure CLI command to retrieve the pool's `nodeCount` property:
+
+```bash
+az containerapp sessionpool show --resource-group <RESOURCE_GROUP> --name <POOL_NAME> --query "properties.nodeCount"
+```
+
 ## General terms
 
 - For pricing details in your account's currency, see [Azure Container Apps Pricing](https://azure.microsoft.com/pricing/details/container-apps/).

articles/container-apps/sessions-custom-container.md

@@ -5,7 +5,7 @@ services: container-apps
 author: anthonychu
 ms.service: azure-container-apps
 ms.topic: conceptual
-ms.date: 06/26/2024
+ms.date: 10/02/2024
 ms.author: antchu
 ms.collection: ce-skilling-ai-copilot
 ---
@@ -240,6 +240,10 @@ This request is forwarded to the custom container session with the identifier fo
 
 In the example, the session's container receives the request at `http://0.0.0.0:<INGRESS_PORT>/<API_PATH_EXPOSED_BY_CONTAINER>`.
 
+## Billing
+
+Custom container sessions are billed based on the resources consumed by the session pool. For more information, see [Azure Container Apps billing](billing.md#custom-container).
+
 ## Next steps
 
 > [!div class="nextstepaction"]