Economic Definition of long-run total cost. Defined.
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Term long-run total cost Definition: The opportunity cost incurred by all of the factors of production used in the long run (when all inputs are variable) by a firm to produce of a good or service, including wages paid to labor, rent paid for the land, interest paid to capital owners, and a normal profit paid to entrepreneurs. Unlike short-run total cost, long-run total cost can not be separated into fixed cost and variable cost. In the long run, all inputs are variable, so all cost is variable.