; (B) shall be limited to modifications designed to achieve a specified aggregate financial contribution for the employees covered by the collective bargaining agreement (taking into consideration any labor cost savings negotiated within the 12-month period before the filing of the petition), and shall be not more than the minimum savings essential to permit the debtor to exit bankruptcy, such that confirmation of a plan of reorganization is not likely to be followed by the liquidation, or the need for further financial reorganization, of the debtor (or any successor to the debtor) in the short term