When I started setting up the infrastructure in AWS, the pricing policy seemed like a real labyrinth to me. Even with a basic understanding of clouds, it was difficult to understand how much things cost and why. It was especially annoying that the same service could cost differently depending on the region. To avoid overpaying, I decided to look for third-party sources of information and accidentally found an article on perfsys.com about . Honestly, it was a godsend. The article laid everything out clearly and simply. I finally understood the difference between On-Demand and Reserved instances, learned about Savings Plans, and found tips on how to avoid unnecessary expenses. Now I make conscious calculations and can accurately forecast my budget. This information really opened my eyes.