The U.S. Postal Service has signed an agreement with Elon Musk’s Department of Government Efficiency to cut 10,000 workers and billions of dollars from the US Postal Service budget.

At least 24,000 probationary workers have been terminated since President Donald Trump took office, according to a lawsuit filed by nearly 20 states alleging the mass firings are illegal. Meanwhile, about 75,000 federal workers accepted the offer to quit in return for receiving pay and benefits until September 30.