Leonard said the terrified woman tried to hide in a cupboard as the offenders grabbed tobacco products, ice creams, lollies and a cash drawer, then fled.
The pair face a number of charges stemming from the events on July 15, while one also faces other charges relating to events in May and June.
Leonard said while the arrests were positive, they were dismayed at the number of people who had become victims within a matter of hours.
“The trauma of being threatened while doing your job is unacceptable, and for some people, the loss of a car can have a profound impact on the life of them and their family.
“This type of offending creates widespread harm in our communities, and we will continue to tackle it head-on. We would like to remind the public to contact police as soon as possible if you see suspicious or illegal behaviour. Call 111 if it’s happening now, or 105 if it’s after the fact.”