Consider the following table providing the prices for three different brands of chocolate-chip cookies during 2008-2009 in a particular country.(Prices are in the country's local currency. ) 
a.Compute the unweighted aggregate price index for 2009,using 2008 as the base year.
B)Interpret the result.
Definitions:
Fears
Emotional responses to perceived threats, which can be instinctive or learned through experiences.
Token Economies
A behavior modification system that uses tokens as reinforcement for desired behaviors, which can be exchanged for rewards.
Operant Conditioning
A learning process through which the strength of a behavior is modified by reinforcement or punishment.
Contingent Monetary Reinforcement
A form of incentive or reward where money is given based on the performance or behavior of an individual, often used in behavior modification strategies.
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