Answer:
2490 + 216d
Explanation:
Fee for food booths: 16(50 + 7d) = 800 + 112d
Fee for game booths: 26(65 + 4d) = 1690 + 104d
Fee for food AND game booths:
800 + 112d + 1690 + 104d = 2490 + 216d
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