Answer: Â $13,475
Step-by-step explanation:
1st hour:  350 people bought tickets --> 350 × $17.50 = $6,125
2nd hour: 350(1.2) people bought tickets --> 350(1.2) × 17.50 = $7350
Total amount = 1st hour + 2nd hour
           = $6,125 + $7,350
           = $13,475