An aging of a company's accounts receivable indicates that $15200 are estimated to be uncollectible. If Allowance for Doubtful Accounts has a $1220 credit balance, the adjustment to record bad debts for the period will require a credit to Allowance for Doubtful Accounts for $15200. debit to Bad Debt Expense for $15200. debit to Bad Debt Expense for $13980. debit to Allowance for Doubtful Accounts for $13980