mistake, error - part of a statement that is not correct; the book was full of errors. malaprop, malapropism - the unintentional misuse of a word by confusion with one that sounds similar. slip of the tongue - an accidental and usually trivial mistake in speaking.
1 The minimum cost of concrete is approximately $70 per cubic yard. 2  The maximum cost of concrete is approximately $80 per cubic yard.  The square footage covered by a cubic yard of concrete varies based on the depth of the feature to be poured.
For the example above, you need approximately 2 cubic yards of ready-mix concrete. According to the NRMCA - Ready-mix Concrete Industry Data Survey, the average cost of concrete in 2014 was $98.23 per cubic yard, or $196.46 for the 2 cubic yards needed for 10x10 patio project listed above.