Section 3(d) in The Customs Tariff (Determination of Origin of Other Preferential Areas) Rules, 1977
(d)"factory or works cost" means the cost of production to the manufacturer at the factory or works and shall include the value of containers and other forms of interior packing ordinarily sold with an article when it is sold in retail, but shall not include the manufacturer's or exporter's profit or the cost of exterior packing, carriage to port and other charges incidental to the export of the article subsequent to its manufacture;
