Mr. Bass transferred a building that had an adjusted basis to him of $300,000 and a fair market value of $500,000, to Corporation C solely in exchange for 100% of C’s only class of stock. The building was subject to a mortgage of $100,000, which C assumed for bona fide business purposes. The fair market value of the stock on the date of transfer was $550,000. What is the amount of gain to be recognized by Mr. Bass?