Exhibit 19-5.Firms A,B,and C operate in the market for computers.Each firm's product is popular in the market and distinct from what the other firms offer.The following table shows the prices of laptops from 2005 through 2007. 
Refer to Exhibit 19-5.Compute the unweighted price index for the three types of laptops in 2006,using 2005 as the base year.
Definitions:
Cognitive Confusion
A state of being perplexed or unclear in one's mind about something, often affecting decision-making and problem-solving skills.
Maladaptive Behaviour
Behavior that is counterproductive or interferes with everyday living and personal effectiveness, often a response to environmental stressors.
Thomas Szasz
He was a psychiatrist known for his criticisms of psychiatry and the medicalization of mental illnesses, advocating that mental illness is more about social and ethical concerns than medical ones.
Prognosis
A prediction of the likely course and outcome of a disease or ailment based on medical knowledge and the patient's condition.
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