First we have to determine how many people fir in each section.
Since these sections are evenly distributed, each section has a third of the capacity, thus= 15,000/3 = 5000 persons per section.
Now we determine revenue by section by multiplying times the ticket price.
5,000 * $10.00 = $50,000
5,000 * $12.50 = $62,500
5,000 * $15.00 = $75,000
We add up the totals for $187,500 and that's the answer!