The slab you see us pouring below used 120 yards of concrete. The cost per cubic yard of 3000 psi concrete for this slab was $92.00 dollars. That's $11,040.00 just for the concrete! The cost for a yard of concrete will vary in different parts of the country and all over the world.ay's Concrete Floors, Inc is the name of my company. We pour a lot of 3000 psi. concrete for interior concrete floors and 4000 psi concrete for exterior concrete. The concrete cost per yard of concrete is $92.00 for 3000 3/4 psi concrete and $100.00 for 4000 3/4 psi concrete.