AB acquired 10% of the equity share capital of XY on 1 January 20X7 for...

AB acquired 10% of the equity share capital of XY on 1 January 20X7 for $180,000 when the fair value of XY's net assets was $190,000.  On 1 January 20X9 AB purchased a further 50% of the equity share capital for $550,000 when the fair value of XY's net assets was $820,000.  

The original 10% investment had a fair value of $200,000 at the date control of XY was gained.  The non controlling interest in XY was measured at its fair value of $300,000 at 1 January 20X9.

Which of the following represents the correct value of goodwill arising on the acquisition of XY that would have been included by AB when it prepared its consolidated financial statements at 31 December 20X9?