account receivable bad debt

Balance sheet of kinkos 1999

12/31/1999 $173,200

12/31/1998 $ 236,400

Accounts receivable less allowance for bad debts of $9,500 and $17,900 for 1999 and 1998 respectively

Kinkos wrote off $10,650 of receivables as bad debts during 1999. What amount of bad debt expense was recognized for the year 1999?