A M P H E N O L C O R P O R A T I O N 2 0 0 4 A N N U A L R E P O R T  Note 10—Selected Quarterly Financial Data (Unaudited)  (1) Includes a one-time charge for expenses incurred in the early extinguishment of debt of $10,367, less tax benefit of $3,525, or  $0.08 per share after taxes.  None.  Under the supervision and with the participation of the Company's management, including the Company's Chief Executive  Officer and Chief Financial Officer, the Company has evaluated the effectiveness of the design and operation of its disclosure  controls and procedures within the 90 day period prior to the filing of this annual report, and based on their evaluation, the Chief  Executive Officer and Chief Financial Officer have concluded that these disclosure controls and procedures are effective. There  were no significant changes in our internal controls or in other factors that could significantly affect these controls subsequent to the  date of their evaluation. Item 9A. Controls and Procedures  Item 9. Changes in and Disagreements with Independent Accountants on Accounting and Financial Disclosure  Three Months Ended  March 31 June 30 September 30 December 31 2004 Net sales  $355,261 $387,119 $384,103 $403,963 Gross profit, including depreciation  112,727 123,573 124,079 131,878 Operating income  61,283 69,054 70,303 76,004 Net income  35,658 40,367 41,646 45,640 Net income per share—Basic  .41 .46 .47 .52 Net income per share—Diluted  .40 .45 .47 .51 Stock price—High  34.70 34.49 34.37 37.52 —Low 28.13 29.75 27.90 32.23 2003 Net sales  $277,774 $304,893 $314,798 $342,039 Gross profit, including depreciation  86,442 92,256 97,117 106,474 Operating income  45,171 49,259 52,372 57,618 Net income  23,313 19,479 $^{(1)}$  28,212 32,986 Net income per share—Basic  .28 .23 (1)  .33 .38 Net income per share—Diluted  .27 .22 (1)  .32 .37 Stock price—High  21.98 24.70 28.84 32.07 —Low 18.50 19.38 23.05 26.03 2002 Net sales  $255,976 $270,865 $268,115 $267,046 Gross profit, including depreciation  76,972 83,967 83,109 83,343 Operating income  40,273 45,032 44,200 44,442 Net income  17,193 20,003 20,666 22,482 Net income per share—Basic  .21 .24 .25 .27 Net income per share—Diluted  .20 .23 .24 .26 Stock price—High  25.88 24.50 21.23 22.91 —Low 20.13 17.75 15.06 13.74 54 