On January 2, 2018, Gregg Company was granted a patent. Gregg appropriately capitalized the $60,000 of costs associated with acquiring the patent and estimated that its useful life would be 15 years. On 4/1/21, Gregg successfully defended the patent in court, incurring $18,000 in legal costs. Soon after the legal action was completed, on 6/1/21, Gregg sold the patent to the plaintiff for $120,000. What journal entry will Gregg make to record the sale of the patent?