REVENUE

Repro has prepared its draft financial statements for the year ended 30 September 20X4. It has included the following transactions in revenue at the amounts stated below. Which of these has been correctly included in revenue according to IFRS 15 Revenue from Contracts with Customers? A Agency sales of $250,000 on which Repro is entitled to a commission of 10%. B Sale proceeds of $20,000 for motor vehicles which were no longer required by Repro. C Sales of $150,000 on 30 September 20X4. The amount invoiced to and received from the customer was $180,000, which includes $30,000 for ongoing servicing work to be done by Repro over the next two years. D Sales of $200,000 on 1 October 20X3 to an established customer who (with the agreement of Repro) will make full payment on 30 September 20X5. Repro has a cost of capital of 10% ans-C Good day, Please i don't understand why the answer isn't B. I'll appreciate if you can explain better.