formula
(3) Submission of bill of materials or formula (A) In general Drawback shall be allowed under paragraph (1) with respect to an article manufactured or produced using imported merchandise or other merchandise classifiable under the same 8-digit HTS subheading number as such imported merchandise only if the person making the drawback claim submits with the claim a bill of materials or formula identifying the merchandise and article by the 8-digit HTS subheading number and the quantity of the merchandise. (B) Bill of materials and formula defined In this paragraph, the terms “bill of materials” and “formula” mean records kept in the normal course of business that identify each component incorporated into a manufactured or produced article or that identify the quantity of each element, material, chemical, mixture, or other substance incorporated into a manufactured article.