It did not quantify the sum, which tops up its earlier $200 million funding.
There may be large, one-off capital grants that are included in the sum which inflate the figure.
The sum, which was reached following donations by more than 30,000 people from around the world, was described as "overwhelming" by those involved.
Typically, the applicants are in a hurry to repay the sum, which they have borrowed and cannot repay on a low-ranking officer's monthly salary of $100.
Mr. Schimmel said that the sum, which he declined to specify, was matched by the Gagosian Gallery, which represents Mr. Murakami in New York, and Emmanuel Perrotin, which represents him in Paris.
In a report entitled The Borrowers, the organisation said the sum, which equates to almost £200 a household, has been ignored by official debt figures, despite including the type of borrowing that was most likely to be detrimental to consumers.
The sum, which was no surprise, based on what had already been reported, is more than $6 million higher than the previous record for a Senate race, set by Michael Huffington, a Republican, in California in 1994.
She is currently embroiled in legal proceedings with the publishers, who are demanding the return of their advance of €160,000, the sum which encouraged her improbable participation in the project.
The sum, which also includes the buyer's premium, represents an auction record for a sculpture.
