How to identify cost incurred per VBCS application in OIC

We are using Oracle Integration Cloud (OIC) with multiple Visual Builder (VBCS) applications in different environments.
We would like to understand how much cost ($) each VBCS application is consuming so that we can track spending and allocate costs to the right projects.
I know OIC provides overall consumption and billing metrics, but I could not find a way to break this down per VBCS application.
Could you please help with:
Whether OIC/VBCS has any built-in feature to view cost per application.If not, is there an API, report, or workaround to estimate this.Any best practices for mapping OIC billing to specific VBCS apps.