An aging of a company's accounts receivable indicates that $9900 are estimated to be uncollectible. If Allowance for Doubtful Accounts has a $4300 credit balance, the adjustment to record bad debts for the period will require a debit to Bad Debt Expense for $9900. debit to Allowance for Doubtful Accounts for $5600. debit to Bad Debt Expense for $5600 credit to Allowance for Doubtful Accounts for $9900