I am planning on doing a 60 ft. walkway, Coventrystone I or III, 3 ft wide for a total of 180 sq. ft so I am calculating for 200 with overage. I am figuring 7 tons of stone to give a 6" compacted base, 1 ton course sand to give the 1 inch bed plus the edging, spikes etc. My local dealer charges $3.85/sq. ft for the Coventrystone III, but I am still shopping around, seems a little high, they are also charging $21/ton for stone and then delivery on top of this. Total job looks to be in the ballpark of $1100. Just checking if my calculations are correct.