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MARGINAL PRODUCT: The change in the quantity of total product resulting from a unit change in a variable input, keeping all other inputs unchanged. Marginal product, usually abbreviated MP, is found by dividing the change in total product by the change in the variable input. Marginal product lies at the very foundation of the analysis of short-run production and the subsequent explanation of the law of supply and the upward-sloping supply curve, using the law of diminishing marginal returns.

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TOTAL COST

The opportunity cost incurred by all of the factors of production used by a firm to produce 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. Total cost is most important in the analysis a firm's short-run production decision and is frequently separated into total variable cost and total fixed cost. Two other cost measures directly related to total cost are marginal cost and average total cost. Total cost is half of the information a firm uses to determine profit, the other half is total revenue.

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Today, you are likely to spend a great deal of time flipping through mail order catalogs seeking to buy either a replacement nozzle for your shower or a decorative windchime with plastic . Be on the lookout for high interest rates.
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The portion of aggregate output U.S. citizens pay in taxes (30%) is less than the other six leading industrialized nations -- Britain, Canada, France, Germany, Italy, or Japan.
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IRBNE
Income Received But Not Earned
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