Where, under this Act, any article is chargeable with duty at a rate dependent on the value of the article, such value shall be deemed to be (a) the wholesale cash price for which an article of the like kind and quality is sold or is capable of being sold at the time of the removal of the article chargeable with duty from the factory or any other premises of manufacture or production for delivery at the place of manufacture or production, or if a wholesale market does not exist for such article at such place, at the nearest place where such market exists, or (b) where such price is not ascertainable, the price at which an article of the like kind and quality is sold or is capable of being sold by the manufacturer or 356 producer, or his agent, at the time of the removal of the article chargeable with duty from such factory or other premises for delivery at the place of manufacture or production, or if such article is not sold or is not capable of being sold at such place, at any other place nearest thereto.