Data for selected fruits purchased at wholesale prices for 2005 and 2009 are shown in the following table. 
What is the unweighted aggregate price index?
Definitions:
Consumer Surplus
The variance between the total consumers are prepared to invest in a good or service and what they end up investing.
Producer Surplus
The difference between the amount producers are willing to accept for a good or service and the higher market price they actually receive.
Tax Revenue
Funds acquired by governments from taxation, employed to support public programs and fulfill government responsibilities.
Total Surplus
The sum of consumer surplus and producer surplus, representing the overall economic benefit to society from a market transaction.
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