Answer: The quality and design of calculators improved dramatically from 2014 to 2016.
A new, safe method of memory enhancement became available for purchase.
As the price of textbooks increased, more and more students turned to the used-book market or chose not to buy textbooks at all, instead using the copies on reserve in the library.
Explanation: If textbook price increases , it might overstate the inflation in cost of going to college.
A new safe memory enhancement will be costly because of it's superior quality and technological progress.
Similarly , new calculator will also be improved and superior.
<em><u>Thus, the survey will reflect higher prices,</u></em>
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