Answer:
Debit to bad debt expense for $3,648
Explanation:
This is because the company needs to show the total amount in the Allowance for doubtful accounts as credit balance. It means that if for instance the balance today is $1,057 you'll need a new entry to adjust the balance with the bad debt.
It means that the entry must be a debit in bad debt expense for $3,648 while the corresponding credit goes to allowance for doubtful accounts.