Cost of individual databases

Are these RDS databases?

Have you looked at the billing detail on your account in the Billing and Cost Management section of the AWS Console?

Use Cost explorer: https://docs.aws.amazon.com/cost-management/latest/userguide/ce-what-is.html You can change the dimension to "Resource" and the service to "RDS" for example.

Yes, I saw that in Cost Explorer and drilling down by Report Parameters. But I cannot see each of my 4 databases. One has significantly higher traffic than the other three as well as far more data -- 70 GB versus 100MB, but there is no breakdown by price.