Company ABC acquired a 30% interest in Company XYZ for $4 million. At the acquisition date, the book value of Company XYZ's net assets was $10 million, and the fair value was determined to be $12 million. The excess of the fair value over the book value was attributed to a patent with a remaining useful life of 5 years. What should be the initial carrying value of Company ABC's investment in Company XYZ under the equity method?