3. When there are no or insufficient sales of the like product in the ordinary course of trade, or where, because of the particular market situation, such sales do not permit a pro
per comparison, the normal value of the like product shall be calculated on the b
asis of the cost of production in the country of origin plus a reasonable amount for selling, general and administrative costs and for profits, or on the basis of the export prices, in the ordinary course of trade, to an appropriate thir
...[+++]d country, provided that those prices are representative.