Firms A, B, and C operate in the market for computers. Each firm's product is popular in the market and is distinct from what the other firms offer. The following table shows the prices of laptops from 2005 through 2007. 
Which of the following is the unweighted price index for the total price of three types of laptops in 2006, using 2005 as the base year?
Definitions:
Labor Supply
Labor supply represents the total hours that workers are willing and able to work at a given wage rate, across different employment sectors.
Administrative Fee
A charge by an institution or business for administrative costs, often added to transactions, memberships, or services.
Monopolized Labor Market
A labor market where a single employer significantly controls the market for jobs and wages.
Equilibrium Wage
The wage rate that balances the quantity of labor supplied and the quantity of labor demanded in a labor market.
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