Answer by taking a quote from the following article:

Donald John Trump (born June 14, 1946) is the 45th and current President of the United States, in office since January 20, 2017. Before entering politics, he was a businessman and television personality. Trump was born and raised in the New York City borough of Queens, and earned an economics degree from the Wharton School of the University of Pennsylvania. He took over his family's real estate business in 1971, renamed it The Trump Organization, and expanded it to involve the construction and renovation of skyscrapers, hotels, casinos, and golf courses.

New Jersey legalized casino gambling in 1977, and Trump went to Atlantic City, New Jersey the following year in order to explore how he might get involved in a new business venture. Seven years later, Harrah's at Trump Plaza hotel and casino opened there; the project was built by Trump with financing from the Holiday Corporation, which also managed the operation. Renamed "Trump Plaza" soon after it opened, it was at the time the tallest building in Atlantic City. The casino's poor financial results exacerbated disagreements between Trump and Holiday Corp., which led to Trump's paying $70 million in May 1986 to buy out their interest in the property. Trump also acquired a partially completed building in Atlantic City from the Hilton Corporation for $320 million; when completed in 1985, that hotel and casino became Trump Castle, and Trump's wife Ivana managed that property until 1988.  Also in 1988, Trump acquired his third casino in Atlantic City, the Taj Mahal, then halfway through construction, through a complex transaction with television host and entertainer Merv Griffin as well as the resort and casino company Resorts International. The Taj opened in April 1990 and was built at a total cost of $1.1 billion, which at the time made it the most expensive casino ever. The project was financed with $675 million in junk bonds and was a major gamble by Trump. The project underwent debt restructuring the following year, leaving Trump with 50% ownership. He also sold his 282-foot (86 m) megayacht, the Trump Princess, which had been indefinitely docked in Atlantic City while leased to his casinos for use by wealthy gamblers.  In 1995, Trump founded Trump Hotels & Casino Resorts (THCR), which assumed ownership of Trump Plaza, Trump Castle, and the Trump Casino in Gary, Indiana. THCR purchased Taj Mahal in 1996 and underwent bankruptcy restructuring in 2004 and 2009, leaving Trump with 10% ownership in the Trump Taj Mahal and other Trump casino properties. From mid 1995 until early 2009, he served as chairman of the publicly-traded THCR organization--which was renamed Trump Entertainment Resorts--and served as CEO from mid 2000 to mid 2005.  During the 1990s, Trump's casino ventures faced competition from Native American gaming at the Foxwoods casino located on an Indian reservation in Connecticut, where it was exempt from the state's anti-gambling laws. Trump stated in 1993 that the casino owners did not look like real Indians to him or to other Indians. Subsequent to that well-publicized remark about the Mashantucket Pequot Tribe, Trump became a key investor backing the Paucatuck Eastern Pequots, who were also seeking state recognition.

for how much did he get the building?
for $320 million;