to be $$7$ per book. The publiaher plans to sell single$-$user access to the book for $$49.$

Through a series of web$-$based experiments, Eastman has created a predictive model that estimates demand as a function of price. The predictive model is demand $=4,000-6p,$ where $p$ is the price of the $e-$book,

$($a$)$ Build a spreadsheet model to calculate the profithoss 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 $ $q,$ it will earn a maximum profit of $s$