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// This function multiplies the linked_field_name field of each associated entry by the corresponding attribute_name attribute.  
 
// This function multiplies the linked_field_name field of each associated entry by the corresponding attribute_name attribute.  
 
// The set of numbers obtained after multiplication is summed.  
 
// The set of numbers obtained after multiplication is summed.  
* $sum('link_field_name.linked_field_name', 'link_field_name:attribute_name', ' @ mul')
+
* $sum('link_field_name.linked_field_name', 'link_field_name:attribute_name', ' @mul')
    
For example, to calculate the total amount of an order, you can use the formula:
 
For example, to calculate the total amount of an order, you can use the formula:

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