; or (2) $10,000,000, in the case of a candidate for the office of Senator. (e) Inflation adjustment In each odd-numbered calendar year after 2018— (1) each of the dollar amounts under subsections (b)(2), (d)(1), and (d)(2) shall be increased by the percent difference determined under section 315(c)(1)(A) (determined by substituting calendar year 2017 for the base period ); (2) each amount so increased shall remain in effect for the election cycle beginning on the first day following the year in which the amount is increased; and (3) if any amount after adjustment under paragraph (1) is— (A) in the case of an amount under subsection (b)(2), not a multiple of $10, such amount shall be rounded to the nearest multiple of $10, and (B) in the case of an amount under subsection (d), not a multiple of $1,000, such amount shall be rounded to the nearest multiple of $1,000. 502. Administration of payments (a) Timing The Commission shall make payments under this title to a participating candidate— (1) in the case of the first payment made to the candidate with respect to the election, not later than 48 hours after the date on which such candidate is certified as a participating candidate under section 513