EXHIBIT 99.1 COMCAST CORPORATION AND SUBSIDIARIES SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS YEARS ENDED DECEMBER 31, 2001, 2000 AND 1999 (In millions) Additions Balance at Charged to Deductions Beginning of Costs and from Balance at Year Expenses Reserves(A) End of Year ------------ --------- ----------- ----------- Allowance for Doubtful Accounts - ------------------------------- 2001 $141.7 $86.3 $74.1 $153.9 2000 136.6 65.9 60.8 141.7 1999 120.7 48.6 32.7 136.6 Allowance for Excess and Obsolete Electronic Retailing Inventories - --------------------------------- 2001 $105.5 $55.1 $46.3 $114.3 2000 89.2 46.3 30.0 105.5 1999 60.9 61.9 33.6 89.2 (A) Uncollectible accounts and excess and obsolete inventory written off.