15E+W+SWhere after any weighing in pursuance of a request under paragraph 13 above the weight of the solid fuel is found to be not less than that marked on any container in which the fuel was made up or than that stated by the seller in any document delivered to the buyer at or before the delivery of the fuel to him, the buyer shall be liable to repay to the seller all costs reasonably incurred by the seller in connection with the weighing.