Ascertain conversion costs and costs of production in the principal growing, producing, or manufacturing centers of the United States of articles of the United States, whenever in the opinion of the commission it is practicable;

Ascertain conversion costs and costs of production in the principal growing, producing, or manufacturing centers of foreign countries of articles imported into the United States, whenever in the opinion of the commission such conversion costs or costs of production are necessary for comparison with conversion costs or costs of production in the United States and can be reasonably ascertained;

Select and describe articles which are representative of the classes or kinds of articles imported into the United States and which are similar to or comparable with articles of the United States; select and describe articles of the United States similar to or comparable with such imported articles; and obtain and file samples of articles so selected, whenever the commission deems it advisable;

Ascertain import costs of such representative articles so selected;

Ascertain the grower’s, producer’s, or manufacturer’s selling prices in the principal growing, producing, or manufacturing centers of the United States of the articles of the United States so selected; and

Ascertain all other facts which will show the differences in or which affect competition between articles of the United States and imported articles in the principal markets of the United States.

The term “article” includes any commodity, whether grown, produced, fabricated, manipulated, or manufactured;

The term “import cost” means the transaction value of the imported merchandise determined in accordance with section 1401a(b) of this title plus, when not included in the transaction value, all necessary expenses, exclusive of customs duties, of bringing such merchandise to the United States.