10%- 15%。 These products are people's daily necessities, but there is no shortage. Therefore, in general, shops that deal in half-baked grain and oil generally have a gross profit margin of 15% and a net profit of 10%. Compared with the purchase price of rice in 2 yuan and 2.3 yuan, the net profit is only about 10% after deducting rent, water and electricity, labor and loss.