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TOTAL COST: The opportunity cost incurred by all of the factors of production used 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. 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.

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MARGINAL REVENUE PRODUCT

The change in total revenue resulting from a unit change in a variable input, keeping all other inputs unchanged. Marginal revenue product, usually abbreviated MRP, is found by dividing the change in total revenue by the change in the variable input or by multiplying marginal physical product by marginal revenue. This is also termed value of the marginal product. Marginal revenue product is a key concept for understanding the demand for productive inputs.

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Today, you are likely to spend a great deal of time wandering around the downtown area hoping to buy either a pair of red goulashes with shiny buckles or a handcrafted bird feeder. Be on the lookout for the last item on a shelf.
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