The details of the expenditures related to Mueller's investigation were laid out in a report released publicly by the special counsel's office.
Mueller's spending included $3.2 million in direct and reimbursed expenditures - including more than $1.7 million for personnel, $733,000 for equipment, $362,000 for rent and utilities, $223,000 for travel and $157,000 for contract services, such as technology services and transcripts, according to the report. The Justice Department's report covered the period from May 17 to September 30.
The rest was spent on the relocation of Justice employees temporarily assigned to the expanding investigation, the report showed. This statement has also been provided to the Senate Committee on the Judiciary and the House Committee on the Judiciary.
The federal government spent almost $7 million investigating Russian meddling in the presidential election between May and September, the Justice Department announced Tuesday.
For perspective, the $6.7 million cost to taxpayers is almost equal to the cost of President Trump's trips to his Mar-a-Lago resort through just his first six months in office.
Though Mueller's investigation is not yet a year old, his team of prosecutors have made significant moves. Papadopoulos and Flynn pleaded guilty to lying to the Federal Bureau of Investigation.
Manafort was charged, along with his longtime business partner Rick Gates, for work on behalf of Ukraine unrelated to the campaign.
Mueller combined several investigations within Justice, including those of Trump campaign contacts with Russian Federation, ex-Trump campaign chairman Paul Manafort's business dealings and disgraced former national security adviser Mike Flynn. Both men admitted to lying to the Federal Bureau of Investigation about their contacts with Russians related to their work for Trump.
In a statement, the special counsel's office said it will release a similar expenditure report after March 31, 2018.