NEW YORK, NY – FEBRUARY 09: (L-R) Michael Boulos, Tiffany Trump, Marla Maples and Masha Rudenko attend the Taoray Wang front row during New York Fashion Week: The Shows at Gallery II at Spring Studios on February 9, 2019 in New York City. (Photo by Noam Galai/Getty Images for Taoray Wa

First daughter Tiffany Trump is still staying far from the spotlight during her father’s presidency, but her recent vacation in Serbia is raising some eyebrows. According to Quartz, her stay in the Eastern European country from March 7-16 cost the U.S. government at least $23,000.

The site calculated the cost based on a purchase order for rooms at the Square Nine hotel in Belgrade. As a member of the president’s immediate family, Trump gets complete Secret Service protection when she travels, even though she was not on official state business.

The second-year Georgetown University law student was on spring break when she traveled to Serbia with her boyfriend, Michael Boulos, the son of a billionaire businessman. While there, Trump posted a photo of herself dancing with a statue, and a video of herself with Boulos and other friends in a lively restaurant in Skadarlija district.

To most of us, $23,000 sounds like quite a bit of money to spend on vacation, but it’s a drop in the bucket of all the expenses the first family’s travel incurs. Not since George Bush Sr. has the U.S. had a president with more than two adult children, and back then, media scrutiny of his adult children was a little less intense — and a little less tangled with the president’s business interests. Both Donald Trump Jr. and Eric Trump have taken international business trips that cost nearly $100,000 apiece in Secret Service travel costs.

The president himself racks up quite a bill every time he visits Mar-a-Lago or one of his other properties. The Government Accountability Office reported that four of his trips to the Palm Beach resort from February 3 through March 5, 2017 cost federal agencies $13.6 million.

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By comparison, President Barack Obama was widely criticized by Republicans in 2009 when he took wife Michelle on a date in New York City, costing the federal government an estimated $72,000. Watchdog groups also found that an Obama trip to Chicago and Florida cost $3.6 million.

Read more from Yahoo Lifestyle:

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• Trump calls George Conway the ‘husband from hell’ and Twitter can’t deal: ‘Sit this one out’

• People react to Melania Trump’s meeting with Venezuela’s opposition leader’s wife: ‘You are no better than your husband’

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