Therefore, if you have an 800 square foot garage you actually need 8 square of shingles. Typically asphalt shingles are the least expensive to install at about $130 per square whereas a metal roof will have a longer warranty but will cost anywhere between $300 and $1,000 per square.
Blood transfusions are usually done in a hospital, an outpatient clinic or a doctor's office. A blood transfusion typically takes one to four hours, depending on which parts of the blood you receive and how much blood you need. You're usually seated or lying down for the procedure.
The minimum period between whole blood donations is 56 days, but for many donors it can be much longer. Because a lot can happen between donations, we are required to treat every donation as a separate event. For the safety of the blood supply and potential blood recipients, we have to take maximum caution and ask the questions every time.