There are three principal layers; 1  External intercostal muscles aid in quiet and forced inhalation. They originate on ribs 1-11 and have their insertion on ribs 2-12. 2  Internal intercostal muscles aid in forced expiration (quiet expiration is a passive process).
Costs. A professional concrete contractor will typically charge $2-$4 per square foot for a simple stain application, including the sealer. A stain application with patterning and sawed lines will typically cost between $4 and $10 per square foot.
Get an INSTANT estimate of the cost to Polish Concrete! Our free calculator uses recent, trusted data to estimate costs for your Concrete Polishing project. For a basic 250 square feet project in zip code 47474, the benchmark cost to Polish Concrete ranges between $4.40 - $5.25 per square foot* .To estimate costs for your project: 1.or a basic 250 square feet project in zip code 47474, the benchmark cost to Polish Concrete ranges between $4.40 - $5.25 per square foot* . To estimate costs for your project: