A company ages its accounts receivables to determine its end of period adjustment for bad debts. At the end of the current year, management estimated that $31,500 of the accounts receivable balance would be uncollectible. Prior to any year-end adjustments, the Allowance for Doubtful Accounts had a debit balance of $900. What adjusting entry should the company make at the end of the current year to record its estimated bad debts expense?