(4) Bulgaria and the Russian Federation: for products which include value added in the exporting preference-receiving country, enter the letter &quot; Y &quot; in Box 8 followed by the value of imported materials and components expressed as a percentage of the fob price of the exported products (example &quot; Y &quot; 45%); for products obtained in a preference-receiving country and worked or processed in one or more other such countries, enter &quot; Pk &quot; .
(4) Bulgaria and the Russian Federation: for products which include value added in the exporting preference-receiving country, enter the letter &quot; Y &quot; in Box 8 followed by the value of imported materials and components expressed as a percentage of the fob price of the exported products (example &quot; Y &quot; 45%); for products obtained in a preference-receiving country and worked or processed in one or more other such countries, enter &quot; Pk &quot; .