If there is exactly one variable input parameter, then under the applicable method, the arm’s length range of PCT Payments is the interquartile range, as described in § 1.482-1(e)(2)(iii)(C), of the set of PCT Payment values calculated by selecting –
(i) Iteratively, the value of the variable input parameter that is based on each observation as described in paragraph (g)(2)(ix)(C) of this section; and
(ii) The single most reliable values for each other input parameter.