Google Cloud provides some robust methods to identify costs and also segment. Availability Zones is actually an AWS concept so thats incorrect. One method, recommended by Debo Aderibigbe, a Google Cloud Billing Product Manager, is to break down costs by:
Billing Hierarchy: Organizations, folders, projects, normalizing them with cross-cloud concepts: Linked Accounts, Tags, Subscriptions, etc.
Resources: Compute cores, RAM, GPU, TPU, Load Balancers, Persistent Disk, Custom Machines, Network Egress Namespaces: labeling specific, isolated containers Labels: Teams, cost centers, app names, environment, and more With a deep labeling and tagging of all of these cost drivers, users can improve the accuracy of how they invoice teams, audit costs, allocate costs, optimize overrun costs, model budgeting scenarios, or fit workload costs within quotas or under budget caps.
Please review this page before the exam...https://www.finops.org/projects/calculating-container-costs/