Amendment No. 3 to Form S-1 Table of Contents AB ACQUISITION LLC AND SUBSIDIARIES Notes to Consolidated Financial Statements The Company records its CVR obligations at fair value using a combined income and market approach. The CVR obligation is estimated using the income approach of a discounted cash flow model with a weighted average cost of capital of 10.0%, and a guideline company method resulting in adjusted total invested capital. As of February 28, 2015, the estimated fair value of the CVR obligations were $270.9 million. The above inputs used for determining the fair value of the CVR obligations are Level 3 fair value measurements. Changes in the fair value of the CVR obligations can result from changes to the discount rates, as well as the Mexican currency value relative to the US Dollar. A reconciliation of the beginning and ending balances for Level 3 liabilities for the fiscal year ended February 28, 2015 follows (in millions): Balance, beginning of year Additions Contingent consideration 270.9 Balance, end of year $ 270.9 For fiscal 2013, for certain of the Company's financial instruments, including cash and cash equivalents, receivables, accounts payable, accrued salaries and wages and other current assets and liabilities, the fair values approximate carrying values due to their short-term maturities. The estimated fair value of the Company's debt, including current maturities, was based on Level 2 inputs, being market quotes or values for similar instruments, and interest rates currently available to the Company for the issuance of debt with similar terms and remaining maturities as a discount rate for the remaining principal payments. At February 28, 2015, the fair value of total debt was $12,095.2 million compared to a carrying value of $11,782.1 million. At February 20, 2014, the fair value of total debt was $3,267.4 million compared to the carrying value of S3,279.8 million. Assets Measured at Fair Value on a Nonrecurri