Chapter 9, Problem 38RE

To determine

To calculate: The expected value of weekly loss from sales of Encyclopedia Galactica which is given by $\left(\text{Loss}=\text{loss per copy sold}\times \text{number of copies sold}\right)$ if the OHaganBooks.com has selling copies of the book at a low price as a promotional gimmick and they paid $\$20$ per copy, and the price is changed every week randomly in a nationally televised drawing. The frequency associated with price and sales is shown in table:

Price	$\$5.50$	$\$10$	$\$12$	$\$15$
Frequency (Weeks)	$1$	$2$	$3$	$4$
Weekly Sales	$6,200$	$3,500$	$3,000$	$1,000$