The phrase "a record sum of" is correct and usable in written English.
It can be used when referring to an amount of money or resources that is the highest ever recorded in a particular context.
Example: "The charity event raised a record sum of $1 million this year, surpassing all previous fundraising efforts."
Alternatives: "an unprecedented amount of" or "a historic total of".
You paid a record sum of $7m for the US rights?
Of course, having a record sum of campaign cash is still a whole lot better than, say, not having it.
Advertisers poured a record sum of money into the Internet last quarter, which may help explain why Web pages are starting to resemble Nascar jerseys.
This week he was revealed to have defied political gravity by raising a record sum of money for the Tories in a year after a general election - a feat that coincided with Labour finances plunging to uncharted depths.
The Bush campaign has raised a record sum of more than $200 million already, and the club's president, Stephen Moore, said he still hoped to raise $10 million from members to buy advertisements related to the presidential race.
Several Barcelona players had observed that since United sold Cristiano Ronaldo to Real Madrid for a record sum of £80 million, or about $132 million, United has become a better team.
He is spending a record sum on advertising, and has hired many of the marketeers who worked for Mr Kirchner in the past.
Each candidate spent a record sum to attract many of the same voters to replace Senator Ernest F. Hollings, the Democrat who was retiring.
WASHINGTON -- The Federal Reserve transferred $47.4 billion, a record sum, to the Treasury Department last year, a result of the central bank's actions to support the fragile housing market.
Trump bragged that he paid only eight million dollars for Mar-a-Lago, but omitted that he bought a nearby strip of beach for a record sum.
The company eventually restated profits by the then record sum of $1.6 billion.Adelphia Communications, a troubled cable-TV group, filed for Chapter 11 bankruptcy.
