The design of a single-store profitability model refers to the design of the way in which a single store can earn a return while creating value for its chosen customers. That is, to design a single store's marginal profit for each individual good or service and various combinations of profitability. Marginal profit per unit = unit price of a good or service sold - variable cost per unit of a good or service, i.e.:m=p-v. where the so-called variable costs are those that vary with the volume of sales (affected by customer traffic), such as the cost of raw materials? Cost of goods sold? sales commissions, and so on. Usually there is a standardized average marginal profit as well as variable cost in each industry.

For example, China's apparel retail industry's marginal profit is generally in the retail price of 50% to 60%. The marginal profit of the restaurant industry is generally in the retail price of 50% to 90%. And the marginal profit of certain service industries will be higher, such as the beauty industry? Training and consulting? Hotel industry? Courier industry? Real estate agents, etc. Because the marginal profit of each kind of goods or services are different, so to design a reasonable number of goods or services combination? Placement and so on, so that the overall operating profit increases. For example, the number of commodities in the superstore a large number of commodities, toiletries and chemicals in general the highest marginal profit, followed by home-produced delicatessen? Dim sum category, so the super will be combined with promotional activities to attract traffic, both to improve the sales of these two categories, but also brought the overall sales of goods rose.