a business entity acquired a long-lived tangible asset on january 1, year 4. on that date, it recorded a liability for an asset retirement obligation (aro) and capitalized asset retirement cost (arc). the estimated useful life of the long-lived tangible asset is 5 years, the credit-adjusted risk-free (carf) rate used for initial measurement of the aro is 10%, the initial fair value of the aro liability based on an expected present value calculation is $250,000, and no changes occur in the undiscounted estimated cash flows used to calculate that fair value. if the entity settles the aro on december 31, year 8, for $420,000, what is the settlement gain or loss (rounded)?