问题描述：
英语翻译
Raw materials costing ￡4 per unit are all purchased on credit in the month of production.One quarter of the cost is paid upon purchase with the balance being paid 2 months later.
Raw materials costing ￡4 per unit are all purchased on credit in the month of production.One quarter of the cost is paid upon purchase with the balance being paid 2 months later.
问题解答：
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