However, most tools will use the marginal rate of your highest tax bracket rather than your effective tax rate.

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So what they're measuring is, is how effective are these ads over a one-week period, which means something to the advertising agency, and certainly you want to be effective rather than ineffective, but it means very little to how the movie will eventually do or even profitability.

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Builders typically install relatively cheap, attractive appliances (rather than the most cost-effective ones) because they think home buyers lack the foresight or expertise to do the math.

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