BTDT, not the best job in the world but if she is just looking for a little extra cash then it might be perfect for her.
Our local store starts people at $7.25/hour +.75 shift diff. The hours are very erratic and you are not guaranteed any hours, it all depends on the number of trucks the store gets in a week. This is usually about 2-3 during normal season and 4-6 during a busy season. During inventory week you get none.
A typical night includes helping set up the dock to unload the truck, unloading the truck, sorting the merchandise by department, dragging all of the merchandise out to the floor and stocking the shelves. The job is boring and very physical. You are always expected to accomplish much more than you ever possibly can, they set plenty of unrealistic goals via their special computer program that tells you exactly what time each department should be completed.
It's a job. Not a great job. I have better jobs and I've definitely had worse.