Elena is making greeting cards, which she will sell by the box at an arts fair. She paid $54 for a booth at the fair, and the materials for each box of cards cost $9.50. She will sell the cards

for $11 per box.

At some point, she will sell enough cards so that her sales cover her expenses. How much will

the sales and expenses be? How many boxes of cards will that take?

Elena's sales and expenses will both be $

if she sells

boxes of cards.

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