The cost of Oracle Cloud Infrastructure (OCI) can vary widely depending on the specific services you require, the region you are operating in, and your usage patterns. Here are some general aspects that can impact the cost:

1. Compute Instances: You pay for the virtual machines (VMs) that you spin up. Different types of VMs come at different price points, depending on the resources they offer.

2. Storage: You pay for the amount of storage you use. This can include block storage, object storage, and file storage.

3. Data Transfer: Usually, inbound data transfer is free, while outbound data is charged.

4. Database Services: If you are using Oracle databases on OCI, those come with their own pricing structure.

5. Additional Services: Services like load balancers, networking, and other PaaS offerings come with their own costs.

6. Licenses: If you are using licensed Oracle software, those licenses can also add to the cost.

7. Support Plans: If you opt for a support plan, there will be additional costs based on the level of support you choose.

8. Reserved Instances: OCI offers the ability to reserve instances for a long term, often at a discounted rate compared to pay-as-you-go pricing.

9. Region-Specific Pricing: Costs can also vary by geographical region.