Question 1132697
Sales proportion--> Start of term: 0.45, End of term: 0.31, Other: 0.24
Average Price--> Start of term:$82.52, End of term:$49.12, Other: $65.23 
For example, about 45% of Ebay auctions for this chemistry textbook occur at the start of the term and the books sell for an average of $82.52 during this time. Using the information above, compute the average price of the textbook over all seasons. (Do not put a dollar sign in your answer.) 
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Weighted average price:: 82.52*0.45+49.12*0.31+65.23*0.24 = 68.02
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Cheers.
Stan H.