Slate Tiles - lewisville,Texas

USA --- Lewisville-Texas -- We want to buy 650 sqf of Deoli green slate in either the 12x12 or the 16x16 Tiles (http://www.g682.net) .  What would be the estimated shipping charges from your location to Lewisville, Texas (zip code 75057)?  Before purchasing this amount, we would like to have a sample.  What would be the cost of the sample and (http://maplered.com) shipping?  Thank you and (http://maplered.com) we look forward to
purchasing from you...September 16