Micromedia is currently planning a two$-$day seminar on the use of Microsoft Excel in statistical analysis. The projected for

$C=$

$($b$)$ Develop a model for the total profit $(P)$ if $x$ students enroll in the seminar.

$p=$

$($c$)$ Micromedia has forecast an enrollment of $40$ students for the seminar. How much profit will be earned if their forecast is accurate?

$P(40)=$$

$($d$)$ Compute the break$-$even point.

$x=$