Explanation:
Box 1: VM1 is turned off, and VM2 continues to run
The budget alerts are for Resource Group RG1, which include VM1, but not VM2.
Box 2: one email notification will be sent each month.
Budget alerts for Resource Group RG1, which include VM1, but not VM2.VM1 consumes 20 Euro/day. The 50%, 500 Euro limit, will be reached in 25 days, and an email will be sent.
The 70% and 100% alert conditions will not be reached within a month, and they don't trigger email actions anyway.
Credit alerts: Credit alerts are generated automatically at 90% and at 100% of your Azure credit balance. Whenever an alert is generated, it's reflected in cost alerts and in the email sent to the account owners.
90% and 100% will not be reached though.
Reference:
https://docs.microsoft.com/en-us/azure/cost-management-billing/costs/cost-mgt-alerts-monitor- usage-spending