The total prize money is 600x30= 18000 yuan.

Extra 18000- 13000=5000 (yuan)

So the number of places for the first prize is

5000(600-400)= 25 (pieces)

The number of places for the second prize is

30-25=5 (pieces)

A: There are 25 first prize places and 5 second prize places.

I hope you can adopt.