The man then ran inside and removed the cash register before running away.
It happened at 4:00 in the morning on the day after Christmas.
Investigators said the suspect drove a dark-colored SUV. He was wearing a dark-colored jacket with an International Brotherhood of Teamsters logo.
The suspect is believed to be in his mid-30s to mid-40s, 5'7" and 170 pounds.
Anyone with information is asked to call Crime Stoppers at 800-577-TIPS (8477).