How much approximately would it cost to have four 31 10.50 r15 tires installed along with the wheels from my original tires to be transferred over into the new tire

call them to be more specific, they might need to see the tires first to give you a accurate price.

I was charged about $15 a tire for something very similar on my 4Runner, althought Andy & employees are great at what they do, they can NOT guarantee that your tire will hold the mount/dismount/mount process well. Keep that in mind

60 dollar's including computer balance and new valve stems Sorry for the late respond just recovered my account back