When you say .15/sqft is this the "magic" number? Are all your expenses rolled into that or is there an addition to...such as your hourly equipment rental, your hourly wage, chems, fuel, ins..on and on...I was thinking the same thing Ken I used .14 and .07 though........This is real nasty 5x5 squares I counted an average of 60 pices of old black gum plus the concrete is in real bad condition looks like they spread a 2" coat of newer conrete over old stuff and it is chipped big time..I know for a fact I will cause additional damage and will be very explicit in my general Terms of the contract....should I just walk away???