The demand curve for cameras is Q=400-2P where P is the price of a camera and Q is the number of cameras sold per week. Answer the following questions. A. If the vendor has been selling 120 cameras per week, how much revenue has she been collecting? B. What is the price elasticity of demand for cameras? C. Does the law of demand hold? D. If the vendor wants to generate more revenue, should she raise or lower the price of cameras?

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