Approx material cost for 150 SF
Concrete: $270- Assume 4 CY min
Forms, Rebar, Exp Jt, etc- $200
Color, Release, Sealer- $200
Stamp Rental- $200
Approx Material- $870
After labor (assume 3 seperate trips), equipment, insurance, overhead, & profit, $12-13/ SF, for 150 SF, would be a bargin.