modèle (1) effet (1) demande (offre et demande) (1) industrie du ciment (1) Costs (1) Article (1) Rich people (1) Transportation (1) Sales (1) Markets (1) Grammar, Comparative and general--Article (1) Finance (1) Example (1) Evidence (1) Distances (1) Competition (1) Business enterprises (1) Article (1) Finance (1) transport (1)