A：To save palm oil production costs, you can reduce raw materials costs, palm oil production plant construction cost, palm oil production line purchase cost and the palm oil production cost.

A：The costs involved in building a palm oil plant include palm oil plant construction cost, palm oil processing plant cost, labor cost, palm oil processing plant maintenance cost, waste management cost, personnel training cost, and transportation cost.

A：The development trends and technological innovations in the palm oil making industry include planting palm fruit trees sustainably, improving palm oil making efficiency and palm oil making waste management, etc.

A：The ways to scale up production in palm oil extraction include improving efficiency in palm fruits plantations, investing in advanced palm oil extraction machines, expanding market outreach, and so on.