Paper 1 October/November 2019 Accounting (9706/11) A Level

The net book value of motor vehicles of a company is shown.
During the year, an old vehicle was traded in as part exchange for a new vehicle. The part
exchange value of the old vehicle was $8000. The remaining purchase price of the new vehicle,
$30000, was paid by cheque.
What was the depreciation charge for the year?