Thank you all for your replies. The issue is not getting an overview of costs - I already have that from the Cost Management Export function in Azure, and by using the system.billing tables in Databricks. The issue is understanding the relation between the different types of compute, and the VMs which are automatically provisioned in the Databricks managed RG to support the compute, for which we are billed separately.

I know how to "tune" a cluster itself to make the clusters in terms of DBUs cheaper, but if I do not know the relation between the different types of compute (dedicated cluster, job cluster, SQL DW etc) and the aforementioned VMs, I cannot know whether the aggregate cost (Databricks compute + Azure infra) for compute is necessarily cheaper, because it's only focusing on one part of the equation (Databricks compute and *not* Azure infra - VMs). Hopefully what I am asking is a bit more clear now.