Document data usage fees for egress private endpoints

Author: jhlodin

src/current/cockroachcloud/costs.md

@@ -260,7 +260,7 @@ Cloud providers may vary in how they calculate each category and define each reg
 
 #### Same-region
 
-There are no charges for same-region data transfer between CockroachDB cluster nodes. Data egressing the cluster to endpoints in the same region for backups or changefeeds, or using private connectivity, is charged the cloud provider's list price for same-region data transfer.
+There are no charges for same-region data transfer between CockroachDB cluster nodes. Data egressing the cluster to endpoints in the same region for backups or changefeeds, or using private connectivity, is charged the cloud provider's list price for same-region data transfer. Egress private endpoint usage is posted as separate line items under _Private endpoint - bytes processed_.
 
 #### Cross-region
 
@@ -270,7 +270,7 @@ Cross-region data transfer includes:
 
 - Data transfer required to support queries that involve lookups on nodes in another region.  
 - CockroachDB replication across nodes that are in different regions.  
-- Data egress from the CockroachDB Cloud cluster via supported [private connectivity]({% link cockroachcloud/connect-to-your-cluster.md %}#establish-private-connectivity) services to a private endpoint in another region.  
+- Data egress (including [changefeed egress]({% link cockroachcloud/egress-private-endpoints.md %})) from the CockroachDB Cloud cluster via supported [private connectivity]({% link cockroachcloud/connect-to-your-cluster.md %}#establish-private-connectivity) services to a private endpoint in another region.  
 - [Managed backup]({% link cockroachcloud/backup-and-restore-overview.md %}#managed-backups) and [Self-managed backup]({% link cockroachcloud/take-and-restore-self-managed-backups.md %}) data transfer to another region.  
 - Change data capture (changefeed) data transfer to another region.
 
@@ -307,6 +307,8 @@ In CockroachDB {{ site.data.products.standard }}, CDC is billed monthly based on
 
 In CockroachDB {{ site.data.products.advanced }}, CDC is billed monthly based on the total size of a cluster's watched tables and whether the {{ site.data.products.advanced }} security add-on is enabled. The per-GiB unit price is tiered, based on the size of watched data: Less than 5 GiB-Month, 5 to 100 GiB-Month, 100 to 250 GiB-Month, 250 to 500 GiB-Month, or 500 GiB-Month and higher.
 
+Changefeeds sent as from a CockroachDB {{ site.data.products.advanced }} cluster over an [egress connection to a private endpoint]({% link cockroachcloud/egress-private-endpoints.md %}) are charged according to [data transfer costs](#data-transfer).
+
 </section>
 
 ## Non-payment

src/current/cockroachcloud/egress-private-endpoints.md

@@ -19,6 +19,10 @@ CockroachDB {{ site.data.products.cloud }} supports egress private endpoints wit
 - [Google Cloud VPC Private Service Connect (GCP PSC)](https://cloud.google.com/vpc/docs/private-service-connect)
 - [Confluent Cloud on GCP or AWS](https://www.confluent.io/confluent-cloud/)
 
+{{site.data.alerts.callout_info}}
+Egress private endpoint usage is billed based on bytes processed over the endpoint, which includes the cloud provider's per-GB data processing fees and any applicable data transfer charges with no additional markup for Cockroach Labs. These charges appear as separate line items on your invoice under _Private endpoint - bytes processed_.
+{{site.data.alerts.end}}
+
 {{site.data.alerts.callout_danger}}
 Regions cannot be removed from a CockroachDB {{ site.data.products.cloud }} cluster if there are egress private endpoints in that region. When a {{ site.data.products.cloud }} cluster is deleted, all private endpoints associated with the cluster are deleted as well.
 {{site.data.alerts.end}}