Was buying a single sticker for my brother for his...

Was buying a single sticker for my brother for his birthday to go with his gift. The girl at the counter goes in a nasty attitude you re only buying one sticker? I looked at her and said yes. Did not appreciate how rude she was but she was soooo nice to my boyfriend. She s a short girl, petite, with short brown hair. My only advice is if you don t like you job then don t do it! Is it your business what I m buying? No.