The balance on December 31, 2015 are as follows: Accounts Receivable - $15,000 Allowance for Doubtful Accounts - $2,400 Bad Debt Expense - $1,800 If Credit sales during 2016 are 100,000 and management deems a 4% allowance appropriate, what is the adjusting journal entry needed on December 31, 2016?

choices

1 Debit Bad Debt Expense $1,600, Credit Allowance for Doubtful Accounts $1,600

2 Debit Allowance for Doubtful Accounts $1,600, Credit Bad Debt Expense $1,600

3 Debit Bad Debt Expense $2,200, Credit Allowance for Doubtful Accounts $2,200

4 Debit Accounts Receivable $1,600, Credit Allowance for Doubtful Accounts $1,600