I WANT TO KNOW ABOUT SERVICE FEES

Hi - The AWS Bills page provides a monthly view of your chargeable costs. For monthly billing periods that have not yet closed, the Bills page will display the most recent estimated charges based on services metered to date. Invoices are generated when a monthly billing period closes, or when subscriptions or one-time purchases are made. For users of AWS Organizations, users logged into the management account can view consolidated charges for all member accounts, with account-level detail available on the “Charges by account” tab. The AWS Bills page provides details of AWS-provided services as well as purchases made through AWS Marketplace. For users of AWS Billing Conductor, the AWS Bills page provides pro forma data to member accounts and the primary accounts of a billing group; management accounts can toggle between chargeable and pro forma data views.

Reference : https://aws.amazon.com/aws-cost-management/aws-billing/features/