Question 902393
Let x = number of notebooks sold


Each notebook sells for $5. So they earn 5x dollars for selling x notebooks.


Profit: 5x + (-100) = 5x - 100


The profit equation is P = 5x - 100


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Breakeven point:



P = 5x - 100


0 = 5x - 100 ... at the breakeven point, the profit is $0, so P = 0


5x - 100 = 0


5x = 100


x = 100/5


x = 20


You need to sell 20 notebooks to break even. This is where you do not lose or gain money. You profit $0.


If you sell more than 20 notebooks, then your profit is positive. So the goal is to sell more than 20 notebooks to make this fundraiser worthwhile.