Hello 
 i have a model:

   indicator.rb
     name    : string
     descriton: string
   end
   has_many :progresindics
----------------------
   progresindic.rb
      date_sale :date
      cant :decimal
  end
  belong_to :indicator
------------------

how setup a table plus? with a last row show the results of sum colum "cant"

thanks 

Quike!

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