Answer:
Total amount paid for tickets in the two hours = $10,237.50
Explanation:
Step 1
Ist Hour, 280 tickets were sold at the cost of $16.25
 Amount of money made in the first hour= Number of people who purchased ticket x price of a ticket 
=280 x 16.25 =$4,550
2nd Hour, 25 % more people purchased ,
 which means the total number of people who purchased tickets = 
1.25 x 280= 350 
 Amount of money made in second hour = Number of people who purchased ticket x price of a ticket 350 x 16.25 =$5,687.5
 
Step 2
Total amount paid for tickets in the two hours = Amount of money made in the first hour +Amount of money made in second hour
=$4,550+ $5,687.5
=$10,237.50