Parts of the teeth include: 1  Enamel: The hardest, white outer part of the tooth. Enamel is mostly made of calcium phosphate, a rock-hard mineral. 2  Dentine: A layer underlying the enamel. Dentine is made of living cells, which secrete a hard mineral substance.  Pulp: The softer, living inner structure of teeth.
Though they vary significantly, transportation costs accounted for 40% of the average overall cost of coal delivered at electric power plants in 2010. On average, nominal U.S. rail rates for shipping coal grew from $11.83 to $17.25 per short ton from 2001 to 2010.
For instance, the AMSA shows the average cost of an interstate move is about $5,630, based on an average weight of 7,400 pounds and distance of 1,220 miles. The average intrastate move was $1,170, based on the same weight and a crew of four. Prices fluctuated depending on where you lived. Ask how long a moving company has been open, about their employees' experience and their insurance information before deciding to hire them.