You will need 0.56 cubic yards of concrete.
You need 82/3 [cubic] yards for every foot deep that it has to be.
If the slab is the standard 4" deep, you will need at least 8.89 cubic yards.
You will need 1.36 cubic yards of cement.
You'll need 1.23 Cubic Yards.
It depends on how deep the concrete. 600 sq ft at 6 inch deep is 300 cu ft = 11.1 yards. 12 inch deep is 22,2 yards; 4 inch deep is 5.5 yards
1.77 cubic yards
It is about 166.67 cubic feet and you will need just over 6.17 cubic yards of concrete.
55.56 cubic yards.
That's just about 3.9 cubic yards for every 6 inches deep.
You will need 17.8 cubic yards of concrete.