The normal value can be determined by a comparable price                      of a similar product in the exporting market, or a comparable                      price of a similar product in a third country, or constructed                      while considering production cost plus an amount of general                      costs and profits. Although no express order of applicability                      is given in the Regulations as to the above three ways of                      normal value determination, it has become an accepted rule                      of practice to apply firstly the order of the export market                      price, secondly the third country price and thirdly a constructed                      price.