$87 total. I subtracted $8 one at a time, until I could divide that number by 5. When I counted four $8 tickets sold, the number was 55. 55 divided by 5 is 11. ]]>

3x$5 = $15

9x$8= $72

15+ 72 =$72

I got this by trying different problems and combinations of a adult and student tickets

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