Where:
HVi = the heating value for FMPi, in Btu/scf
HVi,j = the heating value for FMPi, for partial month j, in Btu/scf
Vi,j = the volume measured by FMPi, for partial month j, in Btu/scf
Subscript i represents each FMP for the lease, unit PA, or CA
Subscript j represents a partial month for which heating value HVi,j is effective
m = the number of different heating values in a reporting month for an FMP
43 C.F.R. §3175.125