I think should or shouldn't it right at that moment, with the situation. If a shop can get casual but if it is in a hotel or a luxury store, it must be dressed to suit the site.
I think it should or should not be doing it with the situation. If you shop online, you can dress casual. If a hotel or luxury shops. You have to dress up to suit the site.
I think I should or should not it is right at that situation. If a general store can dress casual. But if it is in a hotel or luxury shops. It must be appropriately dressed with the place.