Oh and because prices vary almost every week with tires I made myself an excel cheat sheet. All I need is the price of the tire at cost and then I can tell the customer what the final cost will be. I have found that telling someone what the price will be "out the door" is probably one of my best sales tools. I work with my father in law and brother in law and they have priced it per tire for years but now they like my method better. I think that it saves time and bs when the customer hears the final number. I'm not real sugary when it comes to my customers and thier vehicles. I usually put it them in a manner such as, this is the price and now you decide. If not then I'll roll it out and continue with whats in the parking lot.