Answer:
Bad Debt Expenses for 2019
Particular Amount
Allowances for doubtful debts balances as on Dec 31 $9,000
Add: Write off during the year $2,400
Less: Closing balance allowance for doubtful debts balance as on Dec 31, 2018 ($8,000)
Bad debts expenses for 2019 $3400
Bad debt Expenses for 2020
Particular Amount
Allowances for doubtful debts balances as on Dec $10,000
Add: Write off during the year $2,400
Less: Closing balance allowance doubtful debt balance as at Dec 31, 2019 ($9000)
Add: Recovery or bad debt recovered $300
Bad debts expenses for 2020 $3,700