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Cost is the value of money that has been used to produce something and is therefore no longer available. It can also refer to: ==Economics== *Economic cost, an overview of cost in the field of economics * *Opportunity cost, the cost of something measured by the inability to spend the money elsewhere * *Historical cost, also known as accounting cost, the original value of an economic item * *Variable cost, costs of doing business that increase or decrease with the amount of revenue, such as labor and fuel * *Fixed cost, costs of doing business that do not change, such as rent and administration * *Average cost, the total cost of production divided by the number of items produced * * *Average fixed cost * * *Average variable cost * *Marginal cost, the decrease in costs resulting from producing more items * *Cost curve, a graph of cost of production over number of items produced 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Cost (disambiguation)」の詳細全文を読む スポンサード リンク
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