An irked boss who owed an employee $915 paid with 91,500 dirty, oily pennies. That cost him.

A disgruntled Georgia auto repair shop owner who retaliated against a former employee by paying him nearly $1,000 in “dirty, oily pennies” now owes even more money to the man, a federal judge ruled.

A consent judgment from the Northern District of Georgia shows Miles Walker and his company A OK Luxury Autoworks in Peachtree City were recently ordered to pay Andreas Flaten and more than a half-dozen coworkers nearly $40,000 for back wages and liquidated damages.

According to a press release from the U.S. Department of Labor, the federal agency’s Wage and Hour Division department found Walker retaliated against Flaten who contacted the division after Walker failed give him his final paycheck.

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Pennies, a pay stub and violated provisions

Investigators also learned Walker paid Flaten’s final wages of $915 in “91,500 oil-covered pennies” with a pay stub “marked with an expletive to the worker’s home,” the release says.