AWS Billing & Cost Management
AWS Billing and Cost Management is a web service that provides features that helps you monitor your costs and pay your bill.
AWS Pricing Calculator
AWS Pricing Calculator is a web service that you can use to create cost estimates that match your AWS use case.
Savings Plans is a flexible pricing model that helps you save a significant percentage on Amazon EC2 and Fargate usage.
This is an introduction to AWS Billing & Cost Management Services.
Reference: AWS Docs