Consider the following table that provides the prices for three different brands of chocolate-chip cookies during 2008 to 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:
Psychopathology
Refers to the study of mental disorders and abnormalities, focusing on their causes, development, and treatments.
Treatment Interventions
Specific strategies, therapies, or actions implemented to address and manage health conditions, psychological disorders, or behavioral issues.
Clinical Data
Information collected from or about patients in the course of their medical treatment, used for research, diagnosis, and healthcare decision-making.
Prochaska and DiClemente
Psychologists James Prochaska and Carlo DiClemente, known for developing the Transtheoretical Model of change, which outlines stages people go through in altering behavior.
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