Cost
(iii) Cost is the unadjusted depreciable basis (as defined in 1.168(b)-1(a)(3), but without regard to the reduction in basis for any portion of the basis the taxpayer properly elects to treat as an expense under section 179C and this section) of the property. (iv) Throughput is a volumetric rate measuring the flow of crude oil, qualified fuels, or, in the case of property placed in service after October 3, 2008, and before January 1, 2014, shale or tar sands, processed over a given period of time, typically referenced on the basis of barrels per calendar day. (v) Barrels per calendar day is the amount of fuels that a facility can process under usual operating conditions, expressed in terms of capacity during a 24-hour period and reduced to account for down time and other limitations. (vi) United States has the same meaning as that term is defined in section 7701(a)(9).