If we deploy the AWS EKS worker node groups in a single AWS Availability Zone (AZ). How much it will help us to save money

Question

As we know EKS automatically manages the availability and scalability of the Kubernetes control plane nodes. And somehow i manage to deploy worker node groups in a single AWS Availability Zone (AZ. Now I want to know how it would help me to reduce cost. and how much it reduce.

As we know EKS automatically manages the availability and scalability of the Kubernetes control plane nodes. And somehow i manage to deploy worker node groups in a single AWS Availability Zone (AZ. Now I want to know how it would help me to reduce cost. and how much it reduce.