◆ Sketch a demand curve for Windows, Microsoft’s marginal cost curve, and the division of total surplus between consumer surplus and Microsoft’s producer surplus. Microsoft announced that its Windows 8 operating system will be released in October 2012, three years after Windows 7 went public. Windows 8 will be available in 109 languages across 231 markets worldwide.

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Some Data Version Microsoft Windows 8 Versions and Eurozone Prices Full from Microsoft Upgrade from Microsoft Full from Amazon Full from Mission Softs (OEM) Price (euros) 225.27 180.21 146.87 134.22 63.07 Student from Microsoft Microsoft sold 240 million Windows 8 licences per year and at different prices in different national markets.