Aldi and Dierberg's are fundamentally the same retailer in the sense that they both satisfy the same core need for shoppers - selling groceries and other complementary products. Given the thin profit margins on groceries, it is important that retailers operate efficiently with respect to pricing merchandise and controlling expenses. Through financial metrics unique to retailers, one can analyze their respective performances, make assumptions about strategy and judge their efficiency. Aldi has a gross and net profit margin percentage of 12.9% and 4.2% respectively. Dierberg's has a gross and net profit margin percentage of 21.2% and 4.2% respectively. Judging which retailer is doing better challenging, but given these ratios, we can analyze the two retailers regardless of scale. Fundamentally, the idea is to determine which retailer is doing better, and using these ratios, we can make that determination. Given these ratios, analyze each retailers' performance, strategy and cost structure. Make sure your responses are detailed and provide commentary on each part of the analysis.