Concrete

Per cubic yard?

Framing

Per square foot of floor area

Going rate: $30 / SF

Roofing

Per square (a square is 100 square feet of surface area, which means the slope of the roof is a factor).

Asphalt Shingles: $425 / Square

Drywall

Per square foot of floor area, with a modification for complexity and for level of finish (Level 3 is default).

Going rate: $10 / SF

Electric

Rough wiring: Per square foot of floor area

Service Install: lump sum