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9. Approximately, how much do you spend during one transaction E-book €?
more than 500
ago almost 7y
no
ago almost 7y
i don't buy e-books.
ago about 7y
0
ago about 7y
500
ago about 7y
i didn't buy.
ago about 7y
5 €
ago about 7y
€5
ago about 7y
50
ago about 7y
na
ago more than 7y
20
ago about 11y