You can always call to see if they have that many in stock before driving over there. I've done that in the past with good results.
I know they sell them but I'm not exactly sure if that location does
If they have them in stock I would assume you can since technically there is no store or national law that says you can't. I would also assume it would have to depend of the store inventory count some stores might not have that many. I would assume you could and I would grab as many as I was going to buy and proceed to the counter and go about my day. They will either say something or they won't but my bet is on they are not going to say anything.
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