Any concrete estimators on here???

Good afternoon all. I'm in the concrete sales business and more so than not, yardages for such things as foundation, paving and curb and gutter are not available from the contractors. This led me to finding another solution. Revu 21 seemed to be what I needed to learn. If there is anyone in here that does concrete estimating, I would be more than grateful to chat with you and get some pointers.