# Calculations - [Introduction to Calculations](https://help.taglo.io/calculations/introduction-to-calculations.md): Key concepts to understand about Models Calculations - [The Calculation Page](https://help.taglo.io/calculations/the-calculation-page.md): Overview of the Calculation page - [The Formula Entry Bar](https://help.taglo.io/calculations/the-calculation-page/the-formula-entry-bar.md): How to create Calculations in the Formula Entry Bar - [Unit Analysis](https://help.taglo.io/calculations/the-calculation-page/unit-analysis.md): How to keep track of Units when creating a Calculation - [Calculation Parts](https://help.taglo.io/calculations/calculation-parts.md): Overview of Calculation Parts - [Variable References](https://help.taglo.io/calculations/calculation-parts/variable-references.md): How to reference a Variable in a Calculation - [Referencing Time](https://help.taglo.io/calculations/calculation-parts/variable-references/referencing-time.md): How to reference specific Periods of a Variable - [Referencing Dimensions](https://help.taglo.io/calculations/calculation-parts/variable-references/referencing-dimensions.md): How to configure references to Dimensions - [Lookups](https://help.taglo.io/calculations/calculation-parts/variable-references/lookups.md): How to create a lookup reference - [Summarising Variables](https://help.taglo.io/calculations/calculation-parts/variable-references/summarising-variables.md): How to combine lines from Variables with Dimensions - [Period References](https://help.taglo.io/calculations/calculation-parts/period-references.md): How to reference Periods from Calculations - [Functions](https://help.taglo.io/calculations/calculation-parts/functions.md): Introduction to Functions in Models - [Advanced Functions](https://help.taglo.io/calculations/calculation-parts/functions/advanced-functions.md): How to create custom functions using LET and LAMBDA --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://help.taglo.io/calculations.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.