Aspek Keadilan Pada Pemutusan Hubungan Kerja Sebagai Langkah Efisiensi Perusahaan Akibat Kenaikan Biaya Produksi (Studi Kasus Putusan Hubungan Industrial di Pengadilan Negeri Medan Nomor 59/Pdt.Sus-PHI/2019/Pn.Mdn) = The Justice Aspect Regarding Termination Of Employment As A Step Of Company Efficiency Due To Increased Production Costs (Case Study Industrial Relations Court Decision in Medan District Court Number 59/Pdt.Sus-PHI/2019/Pn.Mdn)