Depends on how thick the concrete is. Typically, for a floor that that won't be holding a lot of weight, it would only be poured 2x4 thick, so that would be 3.5 inches thick.
To figure it out, take (.292 x 6 x 35) / 27. 27 is (3x3x3) or 1 cubic yard. In this case, you'd need a little over 2 and a quarter yards of concrete. Figure on $100 per yard....at least that's what we pay around here.
For the grading, my crew normally charges $50 hour.
If you need gravel brought in, that will run you $10 - $15 per cubic yard.
Labor - $2 / Sq. Foot.
This is very general. So, in this case, depending on who is doing your work, you're looking at probably 4 hours of grading - $200.
2 yards of gravel - $30
Labor $420
Extras - Rebar, mesh, curing compound - $100.
Concrete, $250
So, $200+$30+$420+$100+$250 = $1,000.
I typically add 15% on to rough estimates like this though, counting for the contractors tools, gas, travel, etc. I'd say, ball park, $1,150.
6foot
6foot 1
6foot 4"
6foot 7
6foot 2inches
6 feet is 1828.9 millimeters
could be anyware inbetween 6foot 1.5 and 6foot 6
6foot 1 or 2
roald dahl is 6foot 6
brendan fraser is 6foot 4
6x3=18
6foot by 4foot