Pfeifer Corporation acquired an 80% interest in Stern Corporation several years ago when the book values and fair values of Stern's assets and liabilities were equal. At the time of acquisition, the cost of the 80% interest was equal to 80% of the book value of Stern's net assets. Separate company income statements for Pfeifer and Stern for the year ended December 31, 20X4 are summarized as follows: