At the end of the year, a company has a balance in Allowance for Uncollectible Accounts of $2,100 (debit) before adjustment. The balance of Accounts Receivable is $177,000. The company estimates that 9% of accounts receivable will not be collected over the next year. Required: Record the adjusting entry for uncollectible accounts. (If no entry is required for a particular transaction/event, select "No Journal Entry Required" in the first account field.)