Use AWS Trusted Advisor to set up budget notifications. Configure Amazon CloudWatch to monitor costs. Export CloudWatch data to Amazon S3. Use machine learning (ML) to estimate future trends based on the CloudWatch data.

Create a budget in AWS Budgets that has a specified cost threshold. Create an AWS Lambda function that sends a notification to the company when costs reach the specified threshold. Use AWS Billing and Cost Management reports to monitor costs.

Use AWS Cost Explorer to set a specified budget threshold. Create an AWS Lambda function to calculate cost estimates. Configure the Lambda function to send a notification to an Amazon Simple Notification Service (Amazon SNS) topic if estimated costs exceed the specified threshold.

Create a budget in AWS Budgets that has a specified cost threshold. Configure AWS Budgets to send budget alerts to an Amazon Simple Notification Service (Amazon SNS) topic. Use AWS Cost Explorer to monitor costs.