Consider the following information about the price and the price index of a popular book over three years. 
What was the approximate price of the book in 2011?
Definitions:
Bisexuality
Sexual attraction to or sexual behavior with individuals of both the male and female sex.
Transgender Individuals
People whose gender identity differs from the sex they were assigned at birth.
Gender Variance
The exhibition of gender traits that are not typically associated with an individual's biological sex or societal norms.
Gender Fluidity
The concept of gender identity being non-fixed and able to change over time, reflecting a dynamic understanding of gender beyond binary categories.
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