The Special Counsel’s Office released new an expenditure report Friday which revealed that the six months between the beginning of April through September cost about $4.5 million. More than half of the total cost is attributed to personnel compensation and benefits…

Though the investigation comes with a hefty price tag, it may have actually paid for its own investigation, with its probe leading to monetary estimated gains of up to $48 million for the government through the tax evasion the investigation has revealed.

Paul Manafort, Trump’s former campaign chairman, was sentenced for conspiracy and obstruction of justice in September. As part of his plea deal, Manafort agreed to forfeit assets that amount to between $42 million and $46 million, including about $22 million in property, CNBC reports. The case revealed how Manafort avoided paying more than $15 million in taxes by laundering $60 million from pro-Russian Ukrainians, CNN reports.