Commodity2005200620072008200920102011
Chalk$3,770,304$2,714,194$2,360,275$2,714,784$1,698,377$1,057,518$1,833,119
Total$3,770,304$2,714,194$2,360,275$2,714,784$1,698,377$1,057,518$1,833,119