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.
The average moving cost per hour varies between $85 to $95 depending on the moving date. This is the average cost for hiring two men and a truck. Usually in summer it is more expensive to move as well as at the end of the month. So checking how much the hourly rate for movers is is one of the things to do before moving.he average moving cost for hiring a truck to take you from Northern Virginia to Boston for example would cost you approximately between $650 and $750. If you decide to hire a truck for moving, this would cost you on average between $650 and $750 which is a price that does not include fuel cost.