I get my contact lens by paying $139 which includes two boxes of disposable color contacts and 2 bottles of sterilizing solution for my contacts from costco. I think it might be the same price as those in Walmart. You can go to their online store and have a look.
The cost of contact lenses are different for each types of contact lenses at Costco. One of my friend have bought contact lenses from there. It is just about $32/box. Besides, if you order it online, you also required to pay for the shipping. And personally, as long as you know your prescription, contact lenses are almost the same no matter you buy it from Costco or Walmart. JUst have a try. Good luck.
Well, you should know that there are different kinds of contact lenses, so they vary in different prices. Because they can be made of different materials, and they are made for different functions, you should choose them with your own situation and your own needs. So I can not give a certain number. You can go and check them on internet. If you buy them online, there will be cheaper than the real store. So just go and buy them online.