The deductive value of the merchandise being appraised is whichever of the following prices (as adjusted under paragraph (3)) is appropriate depending upon when and in what condition the merchandise concerned is sold in the United States:

(i) If the merchandise concerned is sold in the condition as imported at or about the date of importation of the merchandise being appraised, the price is the unit price at which the merchandise concerned is sold in the greatest aggregate quantity at or about such date.

(ii) If the merchandise concerned is sold in the condition as imported but not sold at or about the date of importation of the merchandise being appraised, the price is the unit price at which the merchandise concerned is sold in the greatest aggregate quantity after the date of importation of the merchandise being appraised but before the close of the 90th day after the date of such importation.

(iii) If the merchandise concerned was not sold in the condition as imported and not sold before the close of the 90th day after the date of importation of the merchandise being appraised, the price is the unit price at which the merchandise being appraised, after further processing, is sold in the greatest aggregate quantity before the 180th day after the date of such importation. This clause shall apply to appraisement of merchandise only if the importer so elects and notifies the customs officer concerned of that election within such time as shall be prescribed by the Secretary.

For purposes of subparagraph (A), the unit price at which merchandise is sold in the greatest aggregate quantity is the unit price at which such merchandise is sold to unrelated persons, at the first commercial level after importation (in cases to which subparagraph (A)(i) or (ii) applies) or after further processing (in cases to which subparagraph (A)(iii) applies) at which such sales take place, in a total volume that is (i) greater than the total volume sold at any other unit price, and (ii) sufficient to establish the unit price.