Trying to Buy a Laptop from best buy to run LOL

I have been having a hard time with money and trying to figure out a cheap laptop to run the recommended settings for LOL. Honestly I really need someone to dumb it down for me. I want it from best buy because I was planning on using a credit card from there. If its possible to get back to me as soon as possible. I am leaving for the weekend and I really need some entertainment. The laptop will Only be used for LOL.