Mari is participating in national lemonade stand day she spends 18 dollars for start up costs which include the supplies to make the lemonade cups and advertising how will mari end up the lemonade stand breaking even

Mari has spent $18 on startup costs (supplies to make the lemonade cups and advertising)

The break-even point is the point at which the revenue earned just meets the costs

Now, to break-even she needs to make sure she sells lemonade worth at-least $18 on the national lemonade day.

If she manages to make more than $18, then anything beyond $18 would be her profit.

? did you miss the rest of the question?