@Nandini Malhotra (International Supplier) Welcome to Microsoft Q&A Forum, Thank you for posting your query here!
To get a cost estimate for using Azure storage for backups, you can use Azure Migrate assessments. Azure Migrate provides a performance-based sizing option that helps you to right-size VMs, and should be used as a best practice for optimizing workloads in Azure. In addition to right-sizing, there are a few other options to help save Azure costs, such as Reserved Instances, Azure Hybrid Benefit, Enterprise Agreement, and Offers.
However, to determine whether there are any discounts included with the EA, you can refer to the Azure EA pricing documentation. The documentation provides details on how usage is calculated and goes over charges for various Azure services in the Enterprise Agreement where the calculations are more complex.
Use Azure Pricing Calculator: Utilize the Azure Pricing Calculator (https://azure.com/pricing) to estimate the cost of Azure Storage based on your backup requirements. Input parameters such as storage type, data redundancy options, and anticipated usage.
I would recommened to contact Billing and Subscription team would be the best to provide more insight and guidance on this scenario: https://azure.microsoft.com/en-us/support/options/ it's free, and it's the best choice for your scenario. They can provide the detailed information on your requirement based on your region. They can provide valuable insights into the EA renewal process and discuss the specific requirements and goals for moving to the cloud. EA renewals often come with some opportunities for negotiation and customized agreements based on your organization's needs.
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