In a transaction that qualifies under Section 351, Buster transfers an asset with a basis of $50,000 and a fair market value of $80,000 to Bronco, Inc. in exchange for Bronco common stock. The asset is encumbered by a $75,000 liability, which Bronco assumes. The liability was incurred many years ago to acquire the asset being transferred. Buster owns 100% of Bronco, Inc. Buster must recognize a gain on this transaction of: