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DERIVATION, AGGREGATE EXPENDITURES LINE: An aggregate expenditures line, a graphical depiction of the relation between aggregate expenditures and the level of aggregate income or production, can be derived by sequentially adding expenditures by the four macroeconomic sectors (household, business, government, and foreign). This derivation process begins with the consumption line, then adds investment, government purchases, and finally net exports. The process actually generates three alternative aggregate expenditures lines based on the number of sectors included (two sector, three sector, and four sector).

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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 at a garage sale trying to buy either a replacement nozzle for your shower or a decorative windchime with plastic . Be on the lookout for telephone calls from former employers.
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