While the term proof stuck, in America, the standard it refers to has nothing to do with gunpowder. Around 1848, 50% alcohol by volume was chosen as a baseline and 100 was used as its corresponding proof. Thus, the proof is double the ABV. In other countries, other proof systems are used. For example, in 1816 the U.K. started to use gravity as their standard.
Cost for rental will vary. Generic albuterol nebulizer solutions cost about $.40 for 10 doses and brand name versions can cost up to $12.10 for 10 doses, according to an analysis of national average sales prices by the Office of the Inspector General in the U.S. Department of Health and Human Services.
Fertilizer costs increased much more rapidly after 2006. For corn, fertilizer costs were $90 per acre in 2007, $124 per acre in 2008, and $185 per acre in 2009. Because of fertilizer price decreases, fertilizer costs declined to $122 per acre in 2010.From the 2010 level, fertilizer costs rose to $159 per acre in 2011 and $200 per acre in 2012. The 2012 fertilizer cost exceeded 2009 levels and was the highest per acre cost experienced in history.n application rate that cost $20 per acre in 2013 likely will be around 20% less in costs in 2014. Overall commodity prices likely will decrease more than fertilizer prices. Corn prices averaged $6.70 in 2013 and likely will be closer to $4.00 in 2014, a 38% decline.