Answer:
Date       Account Title                 Post REF   Debit      Credit
20 Dec. 31   Bad Debt Expense                     $27,300
           Allowance for Doubtful Debt                       $27,300
Explanation:
The bad debt expense for the year is estimated at 1% of credit sales using the percentage of sales method:
= 1% * 2,730,000
= $27,300
This figure will be debited to the expense account for Bad debts and credited to the Allowance for Doubtful debt account.