GBA Macao Group, which is a group listed in Shenzhen, was incorporated by two sisters. Miss GiGi Young and Chantel Young, in Macao in 1990. GBA was originally involved in hotel investment and hotel management business in Macao but has later expanded presence in many business in many places. GBA is now sourcing funds in Shenzhen and Hong Kong and has expanded presence in Europe. GBA prepares its financial statements in accordance with the International Financial Reporting Standards. One of GBA's partners its operation is Yoyo Group. During 2020, GBA and Yoyo discussed a plan to have more close cooperation. Pursuant to the plan, GBA would pay $3 million to the owner of Yoyo to purchase 300 shares of Yoyo initially. Then, at the second stage, GBA would pay additional $6 million to another owner of Yoyo to purchase additional 500 shares of Yoyo. Rock, the financial controller of GBA, has estimated that, the carrying amount of Yoyo's net assets should be $6.9 million at the first date of share purchase. He is not sure the fair value of Yoyo's net assets but may consider that it would be the same as its carrying amount of them. He has also estimated that, at the second date of share purchase, the carrying amount of Yoyo's net assets should be quite stable and only increased $500,000. The total issued share capital of Yoyo are 1,000 shares held by several shareholders. Required: Calculate and determine the acquisition-date fair value of GBA's previously held equity interest in Yoyo.