Add PTUs Pricing Estimate documentation

Author: brown9804

0_Azure/3_AzureAI/AIFoundry/demos/10_PTU_pricing_estimate.md

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+# PTUs Pricing Estimate - Overview 
+
+Costa Rica
+
+[![GitHub](https://img.shields.io/badge/--181717?logo=github&logoColor=ffffff)](https://github.com/)
+[brown9804](https://github.com/brown9804)
+
+Last updated: 2025-12-29
+
+----------
+
+`Provisioned Throughput Units (PTUs)` <br/>
+`Tokens Per Minute (TPM)`
+
+<details>
+<summary><b>List of References </b> (Click to expand)</summary>
+
+- [Azure OpenAI pricing](https://azure.microsoft.com/en-us/pricing/details/cognitive-services/openai-service/?msockid=38ec3806873362243e122ce086486339) - table
+- [Pricing calculator](https://azure.microsoft.com/en-us/pricing/calculator/) - more precise
+- [Input TPM per PTU](https://learn.microsoft.com/en-us/azure/ai-foundry/openai/how-to/provisioned-throughput-onboarding?view=foundry-classic#latest-azure-openai-models) - table
+- [Deployment types for Microsoft Foundry Models](https://learn.microsoft.com/en-us/azure/ai-foundry/foundry-models/concepts/deployment-types?view=foundry-classic#global-provisioned)
+- [Understanding costs associated with provisioned throughput units (PTU)](https://learn.microsoft.com/en-us/azure/ai-foundry/openai/how-to/provisioned-throughput-onboarding?view=foundry-classic)
+
+</details>
+
+<img width="1125" height="511" alt="image" src="https://github.com/user-attachments/assets/d418bd70-073b-4d26-906b-3c135d51a8ac" />
+
+
+From [Understanding costs associated with provisioned throughput units (PTU)](https://learn.microsoft.com/en-us/azure/ai-foundry/openai/how-to/provisioned-throughput-onboarding?view=foundry-classic)
+
+
+## Provisioned Capacity Calculator
+
+> Improve accuracy of your estimate by adding multiple workloads to your PTU calculation. Each workload will be calculated and displayed as well as the aggregate total if both are running at the same time to your deployment.
+
+https://github.com/user-attachments/assets/31b5e2db-79dd-432f-a250-46227d551fcc
+
+
+<!-- START BADGE -->
+<div align="center">
+  <img src="https://img.shields.io/badge/Total%20views-1633-limegreen" alt="Total views">
+  <p>Refresh Date: 2025-12-03</p>
+</div>
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