Bert had accounts receivable of $280,000 and an allowance for doubtful accounts of $10,800 just before writing off as worthless an account receivable from Ernie Company of $1,600. After writing off this receivable what would be the balance in Bert's Allowance for Doubtful Accounts? $12,400 credit balance. $10,800 credit balance. $9,200 debit balance. $9,200 credit balance.