Answer:
Date    General Ledger                     Debit     Credit
May 24  Accounts Receivable-Old Town Café  $18,450
           Sales                                  $18,450
       Cost of goods sold                 $11,000
            Inventory                               $11,000
Sept. 30  Cash                             $6,000
           Allowance for Doubtful Accounts            $12,450
           Accounts Receivable-Old Town Cafe        $18,450
Dec. 7   Accounts Receivable-Old Town Cafe    $12,450
           Allowance for Doubtful Accounts           $12,450
       Cash                               $12,450
            Accounts Receivable-Old Town Cafe        $12,450