Sumas y Restas (English: Additions and Subtractions ) is a 2004 Colombian drama film directed and co-written by Víctor Gaviria. The plot follows a young real estate developer who ventures into cocaine trafficking lured by the opportunity of making quick money, but his life descends in a spiral of drugs and violence. As he did in his previous films, Víctor Gaviria opted to cast non-professional actors.