The profit of wholesalers is generally about 2 yuan per barrel (5 liters), the profit of retailers or small supermarkets is 3-5 yuan/barrel (5 liters), and the profit of 1.8 liters is 3 yuan/barrel. Depending on the quantity and the change of the market, there will be a certain range of fluctuations. Edible oil, also known as "edible oil", refers to animal or vegetable oils used in the preparation of food. It is liquid at room temperature. Due to the source of raw materials, processing technology and quality reasons, common edible oils are vegetable oils, including corn oil, canola oil, peanut oil, sesame oil, corn oil, olive oil, camellia oil, palm oil, canola oil, sunflower oil, soybean oil, sesame oil, flaxseed oil (flax oil), grapeseed oil, walnut oil, seed oil and so on. China has implemented new national standards for cottonseed oil, sunflower oil, oiltea seed oil, corn oil, rice bran oil, soybean oil, peanut oil and other edible vegetable oils, and the sale of oils that do not meet the new standards will be gradually prohibited. Edible oil will be divided into four grades according to the quality from high to low, including first grade, second grade, third grade and fourth grade, respectively equivalent to the original salad oil, advanced cooking oil, first grade oil and second grade oil. That is to say, consumers only need to look at the level of product calibration, you know the quality of cooking oil is good or bad. Reference: Edible Oil Encyclopedia