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EQUIPMENT: One of the main categories of capital. Other categories are structures and inventories.

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MARGINAL REVENUE, PERFECT COMPETITION

The change in total revenue resulting from a change in the quantity of output sold. Marginal revenue indicates how much extra revenue a perfectly competitive firm receives for selling an extra unit of output. It is found by dividing the change in total revenue by the change in the quantity of output. Marginal revenue is the slope of the total revenue curve and is one of two revenue concepts derived from total revenue. The other is average revenue. To maximize profit, a perfectly competitive firm equates marginal revenue and marginal cost.

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PURPLE SMARPHIN
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Today, you are likely to spend a great deal of time visiting every yard sale in a 30-mile radius trying to buy either clothing for your pet dog or an ink cartridge for your printer. Be on the lookout for fairy dust that tastes like salt.
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A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court!
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