Rory and Lane go to buy cosmetics at the beauty store. Kirk is now working there instead of Shane, making this another of Kirk’s jobs (it raises the question, does Taylor own this business as well?). Kirk does have an interest in beauty products, having created his own line of skin treatments, which was shut down by the EPA.
I don’t know whether Shane has left the job at the store, or if she works there on a different shift. If the latter, her shift has changed, as she previously served the counter at the same time Rory was home from school.