Mock Exam 2 September 2016 Block Co Question

This is an extract from the question Block co Section B Question 25

Agreement 3- This sale and leaseback relates to a cutting machine purchased by Blocks Co on 1 January 20X4 for $300,000. The carrying amount of the machine as at 31 December 20X4 was $250,000. On 1 January 20X5, it was sold to Cogs Co for $370,000, the fair value of the asset was $320,000, and Blocks Co will lease the machine back for five years. The sale meets the revenue recognition requirements of IFRS 15 Revenue from Contracts with Customers. The financial liability is measured at $300,000 on 1 January 20X5, of which $50,000 relates to the additional financing.

For agreement three, what profit should be recognized for the year ended 31 December 20X5 as a result of the sale and leaseback (to the nearest whole $)?

In the practice platform the answer is 15313 but the answer in the BPP mock exam answer sheet is 6486. Which is the right answer ?
How do we calculate it?