Hagibis Motors Corporation (Hagibis) has 500 regular employees in its car assembly plant. Due to the Asian financial crisis, Hagibis experienced very low car sales resulting to huge financial losses. It implemented several cost-cutting measures such as cost reduction on use of office supplies, employment hiring freeze, prohibition on representation and travel expenses, separation of casuals and reduced work week. As counsel of Hagibis, what are the measures the company should undertake to implement a valid retrenchment? Explain. (2016 BAR)