The net book values of a company’s non-current assets were as follows. On 1 January 2017, they stood at $20000$. By 31 December 2017, they had reduced to $15000$. Throughout 2017, non-current assets costing $7000$ were purchased. Non-current assets were disposed of, giving rise to a profit of $1000$. The depreciation charge for 2017 amounted to $8000$. What were the disposal proceeds of the assets sold?
- A$3000$
- B$4000$
- C$5000$
- D$8000$