Dave Bautista is the owner of a manufacturing firm called Stones Steel. Stones Steel sells building materials for commercial as well as residential properties. The firm's competitive strategy is to offer reasonably-priced quality composite building materials that are made using environmentally-sensitive production processes. Similar products sell for higher prices. Dave wants to create a balanced scorecard for the company, something that has never been done before! Is Stones Steel following a cost-leadership or differentiation strategy? Support your answer.