Factor Details

Resource type & cnfgn How much memory? How much CPU?

Usage meters How long was your VM running for?

How many invocations of an Serverless FaaS function?

Which Region? Price varies from Region to Region

Data transfer outside cloud Migrating data from on-premises to cloud is typically free

Migrating data from cloud to On-Premises is NOT free

Data transfer within cloud Within the same zone - free

Between different zones in same region might not be free

Between regions is almost always NOT free

Reserved or Not Some services offer reservations ahead of time

Recommended Prefer private IP address to public IP addresses.

Maximize traffic that stays with an AZ (at least with a Region)