Just wear a proper clothes
7-Eleven is a convenience store. Well, semi formal is a good choice but it is not limited. As long the eye can see youre not too much, but not too little. Will do. But if youre looking for a position as a manager and above, it is good to play safe.
Long sleeves,long pants and covered shoes .
As long look good 4 first impression
Formal Dress Code
Tshirt and slack and a pair of shoe.
A formal attire.