The amount of money they made this year would be 34,578 • 1.25, so they made $43,222.50.
The amount of money they made last year would be 29,914 • 1.25, so they made $37,392.50.
So take $43,222.50 - $37,392.50
They made $5,830 more. Rounded to the nearest hundred dollars would be $5,800