It is primarily due to the cost of transportation and the operation of the fuel station. The cost of transportation is lower if the petrol pump is close to the supply plant, so the pump charges a lower rate than other pumps located further away from the supply plant. In addition, the pump's operating costs, such as salaries, rent, and utilities, would influence diesel pricing at each petrol station. There is also a price difference between companies' pumps; for example, HP charges a different rate than its competitors IOCL and BP, and vice versa.