Analisis Perhitungan Tarif Pengangkutan Gas Bumi Melalui Pipa untuk Infrastruktur Pipa Gas Bumi yang Dibangun Pemerintah Melalui Skema Pembiayaan APBN Studi Kasus Ruas Pipa Transmisi Semarang - Batang = Analysis of Natural Gas Transportation Tariff Calculation Through Pipeline for Natural Gas Pipeline Infrastructure Built by the Government through the State Budget Financing Scheme Case Study of Semarang - Batang Transmission Pipeline Section