Reference: https://docs.oracle.com/en-us/iaas/Content/Identity/Tasks/usingmfa.htm#ariaid-title1

Working with Costs Analysis Tools: Note: There are two versions of the Cost Analysis tool: The Classic Version interface described below, and the Latest Version interface. When you log in to the Console and select Account Management and go to Cost Analysis, the Latest Version of the Cost Analysis tool is displayed by default. Click Switch to Classic Version if you prefer the Classic version of the tool. When switching from the Latest Version to Classic Version, any inputs you have made are not maintained. For more information on the Cost Analysis tools, see Cost Analysis Overview. To filter costs by datesOpen the navigation menu. Under Governance and Administration, go to Account Management and click Cost Analysis.In Start Date, select a date.In End Date, select a date (within six months of the start date).Click Apply Filters. To filter costs by tagsOpen the navigation menu. Under Governance and Administration, go to Account Management and click Cost Analysis.From Tag Key, select a tag.Click Apply Filters. To filter costs by compartmentsOpen the navigation menu. Under Governance and Administration, go to Account Management and click Cost Analysis.From Compartment, select a compartment.Click Apply Filters. References: https://docs.cloud.oracle.com/en-us/iaas/Content/GSG/Concepts/costs.htm
https://www.youtube.com/watch?v=-
RGzG3F9G_s&list=PLKCk3OyNwIzuHYigVbdtDOZOfChcotfj2&index=10

Infrastructure as a service (IaaS) is a form of cloud computing that provides virtualized computing resources over the internet. IaaS is one of the three main categories of cloud computing services, alongside software as a service (SaaS) and platform as a service (PaaS). IaaS architecture and how it works In an IaaS model, a cloud provider hosts the infrastructure components traditionally present in an on-premises data center, including servers, storage and networking hardware, as well as the virtualization or hypervisor layer. Reference:
https://searchcloudcomputing.techtarget.com/definition/Infrastructure-as-a-Service-IaaS