Bluestone Company had three intangible assets at the end of the current year: a. A patent purchased this year from Miller Co. on January 1 for a cash cost of $6,000. When purchased, the patent had an estimated life of 12 years. b. A trademark was registered with the federal government for $4,000. Management estimated that the trademark could be worth as much as $120,000 because it has an indefinite life. c. Computer licensing rights were purchased this year on January 1 for $42,000. The rights are expected to have a six-year useful life to the company.