will calculate the carbon emissions for a building object concode_field_sep double kwh_price concode_elem_sep double bill concode_elem_sep double elec_ef concode_elem_sep int months concode_field_sep void set_bill concode_elem_sep double get_kwh_price concode_elem_sep int get_months concode_elem_sep double get_bill concode_elem_sep String toString concode_elem_sep double get_elec_ef
double function ( ) { return ( get_bill ( ) / get_kwh_price ( ) ) * get_elec_ef ( ) * get_months ( ) ; }