The U.S. Justice Department has released the final bill for Robert Mueller’s Russia inquiry, which shows the former special counsel spent nearly $32 million on the controversial probe.

USA Today citing Mueller’s final expenditure report said his investigation into Russia’s interference in the 2016 election cost exactly $31.7 million. The report was provided by the Justice Department on Friday, Aug. 2.

The investigation took 675 days, which means the former special counsel spent an average of $47,000 each day of taxpayers money for his temporary job.

But in the end, Mueller’s team concluded that there was no evidence that the Trump campaign colluded or conspired with Russia. Mueller said in his report that he could not exonerate President Donald Trump on obstruction of justice in the probe, but also could not name any crime the president committed.

The detailed expenditure report shows that Mueller’s office spent $6.5 million between October and May 31, with the bulk of the costs going to salaries and expenses for the prosecutors, analysts, and agents assigned to the sprawling inquiry.

The sum excludes millions of dollars the government stands to collect from President Trump’s former campaign chairman Paul Manafort, who was convicted of an illicit lobbying operation in Ukraine, but not related to any collusion to Russia.

In the course of the two-year probe, Mueller issued more than 2,800 subpoenas, executed nearly 500 search warrants, obtained more than 230 orders for communication records, issued almost 50 orders authorizing the use of pen registers, made 13 requests to foreign governments for evidence, and interviewed approximately 500 witnesses. He employed 19 lawyers who were assisted by a team of approximately 40 FBI agents, intelligence forensic accountants, and other professional staff.

President Trump has repeatedly called Mueller’s investigation a costly “Witch Hunt” or “Russian Hoax,” which has had adverse impacts on his efforts to improve relations with Russia as well as stole his time to run the country.

Mueller formally closed the special counsel’s office and resigned from the Justice Department in late May.