Six bells commence tolling together and toll at intervals of 2, 4, 6, 8, 10, and 12, seconds respectively. in 30 minutes, how many times do they toll together?

The '2 second one' would ring 900 times
The '4 second one' would ring 450 times
The '6 second one' would ring 300 times
The '8 second one' would ring 225 times
The '10 second one' would ring 180 times
The '12 second one' would ring 150 times

That totals to 2205 times

The answer would be $68.04