At 8.30am, a staff member was opening the ABC Blinds store on Albany Highway when two men came up behind him and pushed him inside.
One of the offenders pressed something sharp into his back and demanded cash. Both offenders fled after being given a sum of money.
One offender was fair-skinned, 24 to 30 years of age, about 178cm, of slim build and clean shaven. He was wearing a black hooded jumper, tight blue jeans, black baseball cap, sunglasses and white sneakers.
The second offender had a tattoo on the top of his right hand that could be the point of a knife.
Call Crime Stoppers on 1800 333 000 with any information.