Inventories (Tables)

3 Months Ended

Mar. 31, 2012

Inventories

Schedule of inventories

	March 31,		December 31,
	2012		2011
Raw materials	$	644,142	$	609,150
Supplies	258,061		251,716
Work-in-progress	106,110		106,609
Finished goods	262,628		232,109
Total inventories	$	1,270,941	$	1,199,584