Answer: The dollar amount that should be credited to Allowance for Uncollectible Accounts at year end is $12,100.
Explanation: As provided in the question, Arundel Company already had a credit balance of $4,000 in allowance for uncollectible accounts, before adjustment. Remember, the allowance account is usually in credit balance and mapped to the accounts receivable account to show the net balance of the receivables that is recoverable, and to show the true and fair position of that amount.
The 2% of credit sales (2% of $805,000) is $16,100 - this should serve as additional provision for bad debts expense at year end and the following journals should have been recorded: Debit Bad debt expense $16,100; Credit Allowance for uncollectible accounts $16,100. But there is $4,000 balance in the allowance account, which serves as the opening balance. The amount deemed irrecoverable during the year is $16,1000, which should represent the additional provision but since there is an exisiting balance in the allowance account, the differential would be recorded as additional provision ($16,100 - $4,000).