Like trisomy 21, mosaic Down syndrome is not inherited. It occurs as a random event during cell division early in fetal development. As a result, some of the body's cells have the usual two copies of chromosome 21, and other cells have three copies of this chromosome.
1 An average cost for a cubic yard of concrete is $75 to $125, depending on how much is needed and local prices. 2  Labor costs to pour and form concrete run somewhere around $3.50 to $7.00 per square foot.3  One homeowner paid $11,000 for a crawl space for a 1,500 square foot home. An average cost for a cubic yard of concrete is $75 to $125, depending on how much is needed and local prices. 2  Labor costs to pour and form concrete run somewhere around $3.50 to $7.00 per square foot.
Labor. The cost to pour a concrete pad takes a big jump if you hire the pros, who charge per hour, per worker. If forming and pouring your pad takes three workers two days to complete at a cost of $30 per worker hour, it could add around $1,400 to your bill.n addition to the cubic yard cost, some delivery companies also have minimum purchase requirements. A cubic yard of concrete commonly runs between $80 and $165, and itâs standard to order a quarter of a yard extra in case you run short. For example, if you need 2 cubic yards to pour the pad, order 2 1/4 yards.