A company has 20 accounts in an organization in AWS Organizations. The accounts are in two OUs: development and production. Multiple teams use the development accounts. The company wants to control the cost that is associated with the development accounts. The company needs a solution that provides a notification when the forecasted monthly cost for all development accounts exceeds a threshold. A solutions architect creates an Amazon SNS topic and subscribes an email address to the topic. What should the solutions architect do next to meet the notification requirement with the LEAST configuration effort?