is this an inequality in a real life scenario? and what is the difference between that and an equation?

Robin has $25. He wants to buy some more boomerangs so he can practice his aiming for knife chucking for a circus act. Robin needs to know the average price so he doesn't use more than $25.

2b < $25
2b / 2 = $25 / 2
b = $12.50

help asap!??

nvrm