Tracking Microservice Cloud Spend with Prometheus and Kubecost

Act as a Principal FinOps Consultant. Architect a highly accurate financial observability pipeline by deeply integrating Kubecost metrics directly into a master Prometheus instance. The goal is to aggressively visualize and track the exact dollar cost of every individual microservice deployed on [CLOUD_PROVIDER]. You must dictate how to enforce the usage of strict [BILLING_TAGS] to mathematically allocate bare-metal and network costs utilizing the [ALLOCATION_MODEL] (e.g., billing by Kubernetes Namespace, Pod Label, or Controller). Provide the complex PromQL queries required to dynamically calculate the 'Monthly Projected Cost' run-rate and a 'Cost Efficiency Score' (Resource requested vs. actual usage). Design a Grafana dashboard UI that overlays CPU/RAM utilization graphs directly on top of real-time dollar spend to shock engineers into optimizing their code.