Answer:
$2,480
Step-by-step explanation:
As the Allowance of Doubtful Accounts already has the credit balance of $2,20, and we need $2,700 at the end of the year. We know that Allowance of Doubtful Accounts has credit nature so it needed $2,480 ($2,700 - $2,20) to be adjusted at the end of the year, to make the adjusted balance equals to $2,700.
Adjusting Entry Will be as follow
Dr. Bad Debt Expense $2,480
Cr. Allowance of Doubtful Accounts $2,480