Purchasing Procedure - Kaiirejunpo

...Both are calculation methods based on the assumption that inventory, which is fungible, is sold in the order of receipt or in the opposite order of receipt, with the flow of value separated from the actual flow of goods. Due to their respective characteristics, the FIFO method is also called the purchase order method, and the LIFO method is also called the reverse purchase order method. When the price of inventory is constant, both methods result in the same amount for cost of sales and ending inventory, but differences arise when prices fluctuate. ...

*Some of the terminology used in relation to the "Purchase Procedure Law" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…いずれも代替性をもつ棚卸資産に関して，価値の流れを実際の物の流れと切り離して，〈受入順に〉または〈受入順とは逆に〉売り上げられるという仮定に基づく計算方法である。おのおのの性質から，先入先出法は買入順法，後入先出法は買入逆法ともいわれる。棚卸資産の価格が一定の場合は，いずれの方法でも売上原価と期末棚卸高とはともに同じ額になるが，価格が変動する場合に違いがでる。…

※「買入順法」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報