It depends on your turnover, supermarkets are big and small, customer traffic is big and small, the strength of the promotional policy on how much impact on profits should be considered.

An analogy: in a supermarket baking area average daily sales of 1000, another supermarket has an average of 10,000 per day, which is 10 times worse, but the former supermarket baking area should be a loss, after a supermarket baking area annual profits may reach about 1 million.