From 'But in most situations in which a firm provides a wide range of goods to customers, some of its products will have low or moderate demand variation, while others' demand will vary a great deal.', can we infer that 'All products a firm carries will have moderate demand variation.' follows logically?
But in most situations in which a firm provides a wide range of goods to customers, some of its products will have low or moderate demand variation, while others' demand will vary a great deal.###All products a firm carries will have moderate demand variation.