Let's denote:
- The number of lower box tickets as x.
- The number of upper box tickets as y.
From the problem, we have the following two equations:
1. x + y = 442 (because the total number of tickets purchased is 442)
2. 12.50x + 10y = 4750 (because the total amount of money spent is $4750)
We can solve this system of equations to find the values of x and y. There are a few methods to solve this system, but I'll use substitution here.
First, let's solve the first equation for x:
x = 442 - y
Now, let's substitute x in the second equation:
12.50(442 - y) + 10y = 4750
5510 - 12.50y + 10y = 4750
5510 - 2.50y = 4750
2.50y = 5510 - 4750
2.50y = 760
y = 760 / 2.50
y = 304
Substitute y = 304 in the first equation:
x + 304 = 442
x = 442 - 304
x = 138
So, 138 lower box tickets and 304 upper box tickets were purchased.