Respuesta :

So in the 20 box: 

25% of 80
50% of 40
10% of 200

In the 30 box:
12% of 250
20% of 150
Under 20 is:
25% of 80
50% of 40
10% of 200

Under 30 is:
12% of 250
60% of 50
20% of 150