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July 6, 2026 

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PI: The abbreviation for personal income, which is the total income received by the members of the domestic household sector, which may or may not be earned from productive activities during a given period of time, usually one year. Personal income is one of three measures of income reported quarterly (every three months) in the National Income and Product Accounts maintained by the Bureau of Economic Analysis.

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MARGINAL REVENUE

The change in total revenue resulting from a change in the quantity of output sold. Marginal revenue indicates how much extra revenue a 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 firm equates marginal revenue and marginal cost.

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The Business About INVESTMENT

I had fun that last time we wandered into Shady Valley's very own Happy-Time Gala-World Fun-Land Amusement Park, didn't you? Let's stroll through it again, just to see what adventures we might find. Okay, I admit to an ulterior motive. The Happy-Time Gala-World Fun-Land Amusement Park recently added a new ride -- the Cap'n Space Fright Whirl. If you thought the Monster Loop Death Plunge roller coaster was exciting, then you're in for a real treat with this one. My interest in the Cap'n Space Fright Whirl, however, is NOT from the standpoint of risking a recently eaten meal. On the contrary, I'm going to don my pointy-headed economist disguise and check out this mass of twisted metal and high-flying cages as a prime example of capital. In the process we might be able to gain some insight into the whys and wherefors of the thing we call investment.
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Today, you are likely to spend a great deal of time driving to a factory outlet trying to buy either a rechargeable flashlight or storage boxes for your computer software CDs. Be on the lookout for bottles of barbeque sauce that act TOO innocent.
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The standard "debt" notation I.O.U. does not mean "I owe you," but actually stands for "I owe unto..."
"Defeat is simply a signal to press onward. "

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