Question 857558
5a+80b<=350
we know that Arnold can't buy more than 4 bats since 4*80=320 and 5*80=400

4 bats and 6 balls
4*80+5*6
3 bats and 22 balls
3*80+5*22
2 bats and 38 balls
2*80+5*38
1 bat and 54 balls
16 balls = 1 bat
for every bat added remove 16 balls