At the beginning of 2016, Metatec Inc. acquired Ellison Technology Corporation for $630 million. In addition to cash, receivables, and inventory, the following assets and their fair values were also acquired Plant and equipment (depreciable assets $153 million Patent Goodwil1 43 million 100 million The plant and equipment are depreciated over a 10-year useful life on a straight-line basis. There is no estimated residual value. The patent is estimated to have a 5-year useful life, no residual value, and is amortized using the straight-line method At the end of 2018, a change in business climate indicated to management that the assets of Ellison might be impaired. The following amounts have been determined: Plant and equipment: Undiscounted sum of future cash flows Fair value 83 million 63 million Patent: Undiscounted sum of future cash flows Fair value 20 million 13 million Goodwil1: Fair value of Ellison Technology Corporation Fair value of Ellison's net assets (excluding goodwill) 483 million 420 million