Retail sales, such as food, apparel and accessories, home products and furnishings, drugstores, specialty items other than motor vehicles and trailers, hardware, stationery, newsstand, variety store or similar sales primarily intended to serve the surrounding neighborhood, provided that sales do not involve manufacturing on the premises except of products the major portion of which are to be sold at retail by the manufacturer to the consumer and provided that no more than four operatives shall be employed in such manufacture.