# Acción de regla: calcola somma

**Usado para:** calcular la suma de un campo que contiene una lista de números.

**Utilizado en:** declaraciones "THEN" y declaraciones "ELSE".

La regla "calculate sum" se utiliza para calcular la suma de una lista de números. Un caso de uso sería cuando tienes una lista de cantidades en stock para cada talla de un producto. Usando la regla "calculate sum" podrías calcular fácilmente la cantidad total en stock de ese producto, que se vería como se muestra a continuación.

<figure><img src="https://helpcenter.channable.com/hc/article_attachments/360007546279/channable_rules_what-does-each-rule-do-rule-calculate-sum-0.png" alt=""><figcaption></figcaption></figure>

La salida de esta regla se vería así:

&#x20;

<figure><img src="https://helpcenter.channable.com/hc/article_attachments/360007546299/channable_rules_what-does-each-rule-do-rule-calculate-sum-1.png" alt=""><figcaption></figcaption></figure>


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