is the price of the e$-$book.

$($a$)$ Build a spreadsheet model to calculate the profit$/$loss for a given demand. What is the demand?

$($b$)$ Use Goal Seek to calculate the price that results in breakeven. If required, round your answer to two decimal places.

$!$

$($c$)$ Use a data table that varies price from $$50$ to $$400$ in increments of $$25$ to find the price that maximizes profit.

If Eastman sells the single$-$user access to the electronic book at a price of $

$,$ it will earn a maximum profit of $