I am looking for advice from someone who uses tailgate spreaders and has the faintest idea as to what their output of ice melt material is under various conditions. I realize this is a wide open question, but I've heard some crazy sounding rates from supposedly knowledgeable people. We are talking rates only for parking lots. Under most conditions, would 3-4 lbs of ice melt per 1M be sufficient??? Can the tailgate spreaders be calibrated for outputs in that range??? The only application rate I found was on one bag of Growmark Ice melt which is Calcium Chloride. They recommend a rate of 4lbs per 1M. Would application rates be fairly similar regardless of what product I decide to use??? I need to establish a guideline for myself so I know if I have a parking lot that is, let's say, 10M, then I (theoretically) apply 40 lbs and can price that out as .8 X 9.75 (price of 50 lb bag) to know that I will have $7.80 in the cost of my ice melt material for the parking lot, excluding walks. Any help in getting me some application rates for various ice melt products and/or tailgate spreader rates would be greatly appreciated. Also, I have read everything in the archives relating to this subject.