Question 1065714
 A company markets exercise DVDs that sell for ​$14.95, including shipping and handling.
 The monthly fixed costs​ (advertising, rent,​ etc.) are ​$16,910 and the variable costs​ (materials, shipping,​ etc.) are ​$5.45 per DVD.
​:
Let x = no. of DVD's 
(A) Find the cost equation and the revenue equation.
C(x) = 5.45x + 16910
R(x) = 14.95x
​(B) How many DVDs must be sold each month for the company to break​ even?
14.95x = 5.45x + 16910
14.95x - 5.45x = 16910
 9.50x = 16910
x = 16910/9.5
x = 1780 DVD's must be sold to break even
​(C) Graph the cost and revenue equations in the same coordinate system and show the​ break-even point.
Graph y = 14.95x  and y = 5.45x + 16910; looks like this
{{{ graph( 300, 200, -1000, 2200, -5000, 33000, 14.95x, 5.45x+16910, 26611) }}}
Blue line shows the revenue at the break even point $26611
:
Interpret the regions between the lines to the left and to the right of the​ break-even point.\
area below the cost line (green), losing money, area above, making a profit