We can use the Azure Pricing calculator to estimate the cost for our workloads by selecting the Azure region and the type of workload that we are trying to use. Below is one such example for a serverless compute:

I have selected the workload type, number of clusters and the warehouse size to know the estimate:

You can find the Pricing calculator here: Pricing Calculator | Microsoft Azure and you can search for Databricks in the products and add it for estimate.