Need Guidance on cost breakdown of Microsoft Foundry Agent portal I created

I have developed a complaint handling portal for customers and employees using Azure AI Foundry. The solution is built with Foundry agents, models from the catalog, input/output caching, agent logging/tracing, and other Foundry capabilities. The frontend and orchestration layer are deployed on Azure Container Apps.

While Azure Cost Analysis provides an overview of spending, several parts remain unclear or act as a black box for accurate estimation, including:

• Token consumption assumptions (input/output tokens across different models and agents)
• User concurrency, sessions, and behavior patterns
• Agent logging and observability costs
• Impact of input/output caching
• Detailed resource consumption and billing in Azure Container Apps

What is the best way to accurately calculate or estimate the total running cost for such an Azure AI Foundry-based platform with Container Apps frontend?

Are there official Microsoft documentation, pricing guides, or reference architectures for cost breakdown? How do companies typically present costs for such AI platforms to attract customers (e.g., TCO models or per-user pricing)? I want to know how the platform costs are shown to customers. 

Thank you.