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  2. History of United States postage rates - Wikipedia

    en.wikipedia.org/wiki/History_of_United_States...

    The large jumps in the early 1900s are because a change by a single penny was significant compared to the cost of the stamp. For example, the price increase from $0.02 to $0.03 on July 6, 1932, was a 50% increase in cost.

  3. Sony Interactive Entertainment - Wikipedia

    en.wikipedia.org/wiki/Sony_Interactive_Entertainment

    sonyinteractive.com. Sony Interactive Entertainment LLC ( SIE) is an American multinational video game and digital entertainment company of Sony. Jointly established by two subsidiaries in 2016, it primarily operates the PlayStation brand of video game consoles and products. It is also the world's largest company in the video game industry ...

  4. PlayStation Network - Wikipedia

    en.wikipedia.org/wiki/PlayStation_Network

    PlayStation Plus (PS Plus) is a paid tiered subscription service that provides users with access to premium features. These features include access to online multiplayer, exclusive discounts on the PlayStation Store, the ability to upload up to 100 GB of saved game files to PlayStation servers, and three games available to download each month ...

  5. PlayStation Plus price increases defended by Sony - AOL

    www.aol.com/playstation-plus-price-increases...

    For premium support please call: 800-290-4726 more ways to reach us

  6. Inverse demand function - Wikipedia

    en.wikipedia.org/wiki/Inverse_demand_function

    To derive MC the first derivative of the total cost function is taken. For example, assume cost, C, equals 420 + 60Q + Q 2. then MC = 60 + 2Q. Equating MR to MC and solving for Q gives Q = 20. So 20 is the profit-maximizing quantity: to find the profit-maximizing price simply plug the value of Q into the inverse demand equation and solve for P.

  7. PlayStation models - Wikipedia

    en.wikipedia.org/wiki/PlayStation_models

    The very first PlayStation model, the Japanese SCPH-1000, shown with original controller and memory card. A number of models of Sony's PlayStation (PS) video game console were produced from 1994 to 2006. Most revisions of the PlayStation were made to fix known hardware issues or lower production costs and time, while others featured substantial ...

  8. Cost-plus pricing - Wikipedia

    en.wikipedia.org/wiki/Cost-plus_pricing

    Cost-plus pricing is a pricing strategy by which the selling price of a product is determined by adding a specific fixed percentage (a "markup") to the product's unit cost. Essentially, the markup percentage is a method of generating a particular desired rate of return. [1] [2] An alternative pricing method is value-based pricing.

  9. P/B ratio - Wikipedia

    en.wikipedia.org/wiki/P/B_ratio

    P/B ratio. The price-to-book ratio, or P/B ratio, (also PBR) is a financial ratio used to compare a company's current market value to its book value (where book value is the value of all assets minus liabilities owned by a company). The calculation can be performed in two ways, but the result should be the same.