I always have trouble with the use of IN and AT
1. I think it is cheap to buy clothes in GAP.
2. I think it is cheap to buy clothes at GAP.
Which is correct? Thanks for helping here!
AT - It is the place where you buy clothes. In is used about the buildings as such.
Thanks for the quick response. What if I bought something in a mall.
1. It's fun to buy things in shopping malls.
2. It's fun to buy things at shopping malls.