Well, not really a dispute but i have a client that is requesting FOUR parking lot areas put down for a commercial lot. They want either 3/4" crushed or recycled crushed concrete put down over existing dirt near a roadway. Each lot is 30'x100'. I figured my calculations out to be 4" thickness 3000 cu ft if 12" deep, divide by 3 for 4" total thickness and divide by 27 to get the amount of yards of stone ill need. It comes out to 37 yards or ~55 tons worth since each yard is around 1.5 tons depending on how its purchased. 3000cu ft/3=1000cu ft /27=37 yards x1.5 x $25 cost per ton =$1,387.50 cost per 30x100sq ft parking area Now for FOUR lots, it would be $1387.50x4=$5,550 cost for materials. Hauling per load is $65. Now this is the more confusing part... It would eat up SEVEN 18 wheeler trailer loads full figuring their truck weighs ~20,000lbs and are carrying 60,000lbs worth of stone. Ive never done a parking lot install, at least nothing this big with 4 of them at a time. That seems like TONS of stone, but either way, now add in that $65x7=$456 for delivery. Now my labor to move this from each area where the truck dumps it or the street, onto the lot which is right next to the street, spread it around, level it off and pack it down "by tire/skid steer weight". Normally id rent an actual rolling packer machine for something like this but they insist that just cars driving on it 4" thick will be fine. Its not a very wet or muddy area, dry if anything. I quoted them $9,300 for all 4 lots. Im at 6 grand minimum for materials, without markup on materials yet plus my labor for a two day job with two guys, my tractor and a skid steer...... On a job like this i get 20% markup on my materials. Thats $7200 plus labor i estimated out to be $2100 for 2 days/3guys/8hrs day is 24hrs@$87.50hr with skid steer, tractor etc... I feel this price is pretty fair. They insist that i can use only 100 tons for all four 30x100 lots and make it at least 3" thick for $7,500? WTF? Should i just tell them fine, $7,500 for 100 tons of rock spread out and don't give a flying hoot about the depth minimum of the stone? That is only $1,625~ in stone cost plus markup and labor, now thats a deal right there! It estimates out to ~1.5" thick, if thats what they want ill take a $7,500 job instead of my $9,300 job.