The document analyzes the sales and operating profit trends of Sainsbury and Tesco from 1998 to 2012, highlighting consistent growth for both firms despite a slight dip in sales in FY2000 for Sainsbury. It suggests that Sainsbury should focus on improving customer service and quality, while Tesco has successfully managed its sales even during economic crises. Additionally, the importance of adjusting business strategies based on changing market conditions is emphasized to maintain competitiveness.