Answer:. ............$
1. Bad debt Dr. 11.0000
Account receivable Or. 11.000
Narration: Bad debts writing off debtors
2. Cash/Bank. Dr 1800
Profit or loss Cr. 1800
Narration. Bad debt previously written off recovered
3. Profit or loss Dr 4000
Allowance for doubtful debts Cr
4000
Narration. Increase in provision for doubtful debts.