At December 31, Gill Co. reported accounts receivable of $243,000 and an allowance for uncollectible accounts of $1,100 (debit) before any adjustments. An analysis of accounts receivable suggests that the allowance for uncollectible accounts should be 4% of accounts receivable. The amount of the adjustment for uncollectible accounts would be: _________

a. $8,620.
b. $9,720.
c. $10,820.
d. $1,100.