The robbery happened about 1:45 on Monday morning at the store on the100 block of Byberry Road.
The man walked into the store, pulled out the box cutter and demanded money.
The suspect made off with $75 in cash. He ran out of the store and fled down Philmont Avenue.
Police are looking for a white male, standing approximately 5'10", weighing 200 lbs., wearing a white t-shirt, blue jeans and tan boots.
No one was injured during the holdup.
