I have a customer who has bought many of my unfinished cross stockings. She will not leave any reviews for me even when I send a freebie and ask nicely for a review in my handwritten thank you note. Today she bought 4 different times from me in 15 minute intervals. Her first order was enough to get free shipping but the other 3 no and they were separate. Am I obligated to send her back the shipping fees if I choose to send all 10 stockings in one mailing pouch? I do not have this in my shop rules. Thank you everyone!