Exhibit 7.1
 
 Year ended December 31,2004
    
    
    2005
    
    
    2006
    
    
    2007
    
    
    2008(thousands constant December 31, 2007 pesos for 2004, 2005, 2006 and 2007 and thousands ofnominal pesos for 2008, except ratio data)Income (Loss) Before Income Tax
    
    
    1,350,495
    
    
    
    213,655
    
    
    
    72,509
    
    
    
    299,631
    
    
    
    (470,361
    )Determination of the RatioFixed charges:Interest expense (1)
    
    
    46,439
    
    
    
    110,889
    
    
    
    94,093
    
    
    
    233,628
    
    
    
    368,400Interest capitalized during period
    
    
    (530
    )
    
    
    (804
    )
    
    
    71,815
    
    
    
    3,942
    
    
    
    (50,709
    )Rental expense
    
    
    15,473
    
    
    
    15,717
    
    
    
    21,450
    
    
    
    18,186
    
    
    
    21,011Amortization of Debt issuance costs
    
    
    (1,480,065
    )
    
    
    (14,708
    )
    
    
    (137,603
    )
    
    
    5,966
    
    
    
    Early extinguishment of debtTotal fixed charges:
    
    
    (1,418,683
    )
    
    
    111,094
    
    
    
    49,755
    
    
    
    261,722
    
    
    
    338,702Earnings:Income (loss) from continuing operations
    
    
    1,350,495
    
    
    
    213,655
    
    
    
    72,509
    
    
    
    299,631
    
    
    
    (470,361
    )Fixed charges
    
    
    (1,418,683
    )
    
    
    111,094
    
    
    
    49,755
    
    
    
    261,722
    
    
    
    338,702Amortization of capitalized interests
    
    
    (1,080
    )
    
    
    (1,920
    )
    
    
    28,852
    
    
    
    16,032
    
    
    
    23,772Less: interest capitalized during period
    
    
    530
    
    
    
    804
    
    
    
    (71,815
    )
    
    
    (3,942
    )
    
    
    50,709Total earnings:
    
    
    (68,738
    )
    
    
    323,633
    
    
    
    79,301
    
    
    
    573,443
    
    
    
    (57,178
    )Ratio of Earnings to Fixed Charges
    
    
    0.05
    
    
    
    2.91
    
    
    
    1.59
    
    
    
    2.19
    
    
    
    (0.17
    )Insufficiency
    
    
    1,349,945
    
    
    
    (212,539
    )
    
    
    (29,546
    )
    
    
    (311,721
    )
    
    
    395,880




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##### 



Year ended December 31,2004
    
    
    2005
    
    
    2006
    
    
    2007
    
    
    2008(thousands constant December 31, 2007 pesos for 2004, 2005, 2006 and 2007and thousands of nominal pesos for 2008, except ratio data)Income (Loss) Before Income Tax
    
    
    (112,644
    )
    
    
    (48,187
    )
    
    
    30,783
    
    
    
    133,178
    
    
    
    (671,457
    )Determination of the RatioFixed charges:Interest expense (1)
    
    
    45,598
    
    
    
    109,678
    
    
    
    144,038
    
    
    
    232,912
    
    
    
    255,662Interest capitalized during period
    
    
    311
    
    
    
    407
    
    
    
    21,870
    
    
    
    4,658
    
    
    
    62,029Rental expense
    
    
    15,473
    
    
    
    15,717
    
    
    
    21,450
    
    
    
    18,186
    
    
    
    21,011Amortization of Debt issuance costs
    
    
    35,190
    
    
    
    37,780
    
    
    
    41,732
    
    
    
    5,966
    
    
    
    Early extinguishment of debtTotal fixed charges:
    
    
    96,572
    
    
    
    163,582
    
    
    
    229,090
    
    
    
    61,722
    
    
    
    338,702Earnings:Income (loss) from continuing operations
    
    
    (112,644
    )
    
    
    (48,187
    )
    
    
    30,783
    
    
    
    133,178
    
    
    
    (671,457
    )Fixed charges
    
    
    96,572
    
    
    
    163,582
    
    
    
    229,090
    
    
    
    261,722
    
    
    
    338,702Amortization of capitalized interests
    
    
    844
    
    
    
    881
    
    
    
    1,716
    
    
    
    4,136
    
    
    
    11,654Less: interest capitalized during period
    
    
    (311
    )
    
    
    (407
    )
    
    
    (21,870
    )
    
    
    (4,658
    )
    
    
    (62,029
    )Total earnings:
    
    
    (15,542
    )
    
    
    115,878
    
    
    
    239,719
    
    
    
    394,378
    
    
    
    (383,130
    )Ratio of Earnings to Fixed Charges
    
    
    (0.16
    )
    
    
    0.71
    
    
    
    1.05
    
    
    
    1.51
    
    
    
    (1.13
    )Insufficiency
    
    
    112,114
    
    
    
    47,704
    
    
    
    (10,629
    )
    
    
    (132,656
    )
    
    
    (721,833
    )