Nula’s accounting year finishes on 31 December. She keeps a provision for doubtful debts of 5% of trade receivables. At 1 January 2021, the provision stood at $800. By 31 December 2021, trade receivables were $13 400, including $600 that was considered irrecoverable. What was the provision for doubtful debts on 1 January 2022?
- A$600
- B$640
- C$660
- D$670