After enough private mail I thought I should add this. Off the top of my head I can remember an 80lb of cement makes 2/3 cu ft. a 40 lb bag make 1/3 cu ft. store bought compost is about the same volume as a 40lb bag of cement. a cu yd is 3ft x 3ft x 3ft or 27 cu ft. at 3 bags per cu ft, this is 54 bags per cu yard + or - a couple for equivilant assumption 20 cu yds is about 1080 bags 40lb bag here is 2.99 round up to $3 to figure in my head, comes to about $3,240 by the bag. My cost in bulk is about $300. I did not nitpick to the nearest cc or to the nearest penny. Ballpark numbers. But close enough for the picture. Byron