# Concepts / Calculations

This section describes the concepts and calculations that are a part of the Replex UI. 

## Calculations

Descriptions are provided for the following calculations:

### [Forecasted cost](https://docs.replex.io/concepts/calculations)

### [Cost previous 30 days](https://docs.replex.io/concepts/calculations)

### [Total cost](https://docs.replex.io/concepts/calculations)

### [Idle cost](https://docs.replex.io/concepts/calculations)

### [Savings](https://docs.replex.io/concepts/calculations)

### [Utilized cost](https://docs.replex.io/concepts/calculations)

### [Cluster score](https://docs.replex.io/concepts/calculations)

### [CPU](https://docs.replex.io/concepts/calculations)

### [RAM](https://docs.replex.io/concepts/calculations)

### [Storage](https://docs.replex.io/concepts/calculations)

### [Attached Node Disks](https://docs.replex.io/concepts/calculations)

## Concepts

The following concepts are described:

### [Agent](https://docs.replex.io/concepts/agent)

### [Aggregator](https://docs.replex.io/concepts/aggregator)

### [Pushgateway](https://docs.replex.io/concepts/pushgateway)

### [Server](https://docs.replex.io/concepts/server)

### [Pricing API](https://docs.replex.io/concepts/pricingapi)