Hey!
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Part A:
6 x 3.49 = $20.94
They spent $20.94 on six goodie bags.
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Part B:
120 / 8 = $15
To rent the bouncy house it will cost $15 per hour.
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Part C:
120 + 20.94 = $140.94
192.53 - 140.94 = $51.59
The parents spent $51.59 more then what was spent in parts a and b.
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Hope This Helped! Good Luck!