A Sonic employee trying to make the nightly deposit was robbed at gunpoint late Tuesday night.
It happened in Greenville at the First South Bank just before midnight.
Officers say 24-year-old Shaconda Perkins was making the nightly deposit when a man showed her his gun and demanded the money.
He took off and Perkins went back to the Greenville Boulevard Sonic and called police.
The suspect he was wearing all black and had a bandana over his face.