> For the complete documentation index, see [llms.txt](https://docs.replex.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.replex.io/concepts.md).

# 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](/concepts/calculations.md)

### [Cost previous 30 days](/concepts/calculations.md)

### [Total cost](/concepts/calculations.md)

### [Idle cost](/concepts/calculations.md)

### [Savings](/concepts/calculations.md)

### [Utilized cost](/concepts/calculations.md)

### [Cluster score](/concepts/calculations.md)

### [CPU](/concepts/calculations.md)

### [RAM](/concepts/calculations.md)

### [Storage](/concepts/calculations.md)

### [Attached Node Disks](/concepts/calculations.md)

## Concepts

The following concepts are described:

### [Agent](/concepts/agent.md)

### [Aggregator](/concepts/aggregator.md)

### [Pushgateway](/concepts/pushgateway.md)

### [Server](/concepts/server.md)

### [Pricing API](/concepts/pricingapi.md)