Lindsay Kelly bought 100 shares of Google,300 shares of Microsoft,and 500 shares of Nokia in January 2005.The adjusted close prices of these stocks over the next three years are shown in the accompanying table. 
Which of the following is the unweighted aggregate price index for Lindsay's portfolio for 2007,using 2005 as the base year?
Definitions:
Cleavage
A geological term referring to the tendency of minerals to break along flat, parallel planes of weakness in their crystal structure.
Joints
Innate cracks or splits in rock formations that occur without any shift, typically due to how the rock reacts to pressure.
Mid-Ocean Ridges
Underwater mountain systems formed by plate tectonics, consisting of various mountains linked in chains.
Contact Metamorphism
Contact metamorphism occurs when rocks are heated to high temperatures and sometimes subjected to increased pressures due to the close proximity of magma or lava, without melting the rock completely.
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