The fee to be charged shall be determined by the chief of the division of markets and the fee for the inspection of a car or less than a car shall in no case exceed five dollars. The chief of the division of markets may fix, assess and collect, or cause to be collected, fees for such services when they are performed by employees or agents of the division of markets. License inspectors may charge and collect as compensation for their services only such fees as may be approved by the division of markets.