Optional Prepayments with Make-Whole Amount (a) The Company may, at its option, upon notice as provided below, prepay at any time all, or from time to time any part of, any Series of the Notes, in an amount not less than 10% of the aggregate principal amount of such Series of the Notes then outstanding (but if in the case of a partial prepayment, then against each tranche within such Series of Notes in proportion to the aggregate principal amount outstanding of each tranche of such Series), at 100% of the principal amount so prepaid, together with interest accrued thereon to the date of such prepayment, plus the Make-Whole Amount determined for the prepayment date with respect to such principal amount. The Company will give each holder of the Series of Notes to be prepaid written notice of each optional prepayment under this Section 8.2 not less than 10 days and not more than 60 days prior to the date fixed for such prepayment. Each such notice shall specify such date, the aggregate principal amount of the Series of the Notes to be prepaid on such date, the principal amount of each Note held by such holder to be prepaid (determined in accordance with Section 8.3), and the interest to be paid on the prepayment date with respect to such principal amount being prepaid, and shall be accompanied by a certificate of a Senior Financial Officer as to the estimated Make-Whole Amount due in connection with such prepayment (calculated as if the date of such notice were the date of the prepayment), setting forth the details of such computation. Two Business Days prior to such prepayment, the Company shall deliver to each holder of the Series of Notes to be prepaid a certificate of a Senior Financial Officer specifying the calculation of such Make-Whole Amount as of the specified prepayment date.