It is legal to sell a bottle of 16 in the market and a bottle of 20 in the shop. Because it needs to include costs and profits, stores need to consider their own costs and profits when selling spirits, including rent, labor, operating expenses and so on. Therefore, stores need to calculate these costs and profits in the sales price. Many 4 yuan comply with laws, regulations and market rules, and there is no price fraud and price monopoly. Generally speaking, it is legal to sell 16 wine in the market and 20 bottles in the store.