Quikrete 80 lb. Concrete Mix110180 The Home Depot
18 x 2 Inches thick or 1/6 Ft. = 3 This equals to 3 x = 2 bags of 80# concrete NOT 14 bags. I have 40 by 3 inch thick (1/4 Ft) area to be filled with concrete, which will take 6 bags of concrete. If I''m wrong in my figures, please let me know. Thanks, Floyd Smith frsmith31 or .