Joann's sometimes trains people with disabilities,usually LD, however, if this was the case, the gal on the cutting table should be monitored. I hope you mentioned it to the cashier. If the person cannot add, that is not the job for her-she should be stocking shelves or cleaning. The manager should know or be informed of her problem so they can put the person in the appropriate job suited for her. Someone probably panicked and put her there cuz they were so busy. They have strict rules they must follow as an employee and are told this at the time of hire.
marla