For a 1.10 R+1A. You should buy in double to start, so 2.10, then add on at the break for $1. Also, depending on if you want to or not, you can add a couple of rebuys for if you donk out early. I think it all depends on your play style, the looser and more aggro, the more likely you are gonna either chip up fast or bust early and have to rebuy.